Definition, properties and the identification of isotopes

Von 24.53 Fr /Std

The word isotopes are the combination of two words, one is Iso which means ''same', and another is topes which means ''places'' those elements which have the same atomic number (numbers
or proton), but different mass number are called isotopes.

In a neutral atom there is
equal numbers of proton and electron, so their chemical properties are same but
have different physical properties, so we can separate them by physical method.

Usually, mass spectrograph
is the method which is used to separate the isotopes of different elements.

Ort

Online aus Pakistan

Alter

Kinder (7-12 Jahre alt)

Jugendliche (13-17 Jahre alt)

Erwachsene (18-64 Jahre alt)

Seniorinnen und Senioren (65+ Jahre alt)

Unterrichtsniveau

Anfänger

Mittel

Dauer

30 Minuten

Unterrichtet in

Niederländisch

Englisch

Urdu

Fachkenntnisse

Physik

Erd- und naturwissenschaften

Chemie

Verfügbarkeit einer typischen Woche

(GMT -05:00)

New York

Online via Webcam

Mon

Tue

Wed

Thu

Fri

Sat

Sun

00-04

04-08

08-12

12-16

16-20

20-24

Sarah

4.74

(23)

SVT is an important subject and it is important that students master the basics and methodology of a successful exam.
Private lessons are offered by a very qualified senior teacher with a very long experience in the French system to remedy the deficiencies and prepare the tests and exams:
* remediation of deficiencies
* summaries + basic notions
* exams and practice tests
* series + application exercises
Classes are for all levels with excellent pedagogy and customized supports as needed.
You will quickly realize that with a good accompaniment and will the notes of the learner will improve and his confidence and sob insurance during exams will increase
It's never too late to catch up.

Samia

4.74

(23)

Physics and chemistry are not difficult. It's a reasoning and logic to acquire. In case of difficulties React quickly so as not to allow the gaps to accumulate: with a little will remediation is always possible.

I am a principal teacher of physics chemistry with a long experience in teaching the French system and the Tunisian system which allowed me to devote myself to the regular follow-up of students in difficulty or wanting to excel.
I offer personalized tutoring according to the needs of the student to allow the student to remedy his shortcomings and acquire the right methodology + enrich his knowledge.
courses for all levels from high school to high school (different sections)
for each session I make sure that the student has assimilated the previous knowledge and revised his homework and then begins a new part of the course: explanation, summaries and exercises of applications. Before each test, we prepare different exams and I make sure that the student has assimilated all the knowledge.
In case of previous difficulties I make sure to remedy these shortcomings and catch up.
the schedules are flexible and the courses are personalized.
Thanks to the courses I teach, you will quickly see that physics and chemistry are not difficult. It is intellectual gymnastics, reasoning and logic to be acquired. React quickly in the event of difficulties so as not to allow the gaps to be added: remediation will be all the easier.
My mission is to help the learner j to take off his notes by overcoming his difficulties and in particular by gaining self-confidence.

Narayan

4.74

(23)

Mathematics course taught by an engineering graduate with over 14 years of teaching experience in mathematics up to the undergraduate level. I also have more than 9 years of experience in teaching and guiding standardized tests such as the GRE and SAT. I can help you learn these standardized courses (GRE, SAT, and even TOEFL) more effectively.

I offer mathematics lessons for various levels of students, including Bachelor students, IB (Math SL and Math HL) students, A-level students, European S6 and S7 level students, GCSE students, and IGCSE students.

I also provide science courses in Physics and Chemistry for students up to the European upper secondary level, as well as IB and A-level students. Additionally, I offer Biology lessons for students up to the European Secondary level, GCSE level, and IGCSE level.

Currently, I am teaching a diverse range of students, including:
- GCSE students
- IGCSE students
- IB students
- European School students
- AS/A-level students
- Lycée Vauban students
- Athénée de Luxembourg students

My current students are from the following schools:
National:
1. St Georges International School, Luxembourg, Edexcel (Pearson) Curriculum (10 students)
2. International School of Luxembourg, Luxembourg, IB Curriculum (6 Students)
3. Lycée Athénée de Luxembourg, Luxembourg, IB Curriculum (4 Students)
4. Lycée - International School Michel Lucius, Luxembourg, Cambridge Curriculum (6 Students)
5. European School Kirchberg, Luxembourg, European Curriculum (4 students)
6. Lycée Aline Mayrisch, Luxembourg, Luxembourgish curriculum (1 student)
7. Lënster Lycée International School, Luxembourg, European Curriculum (2 Students)

International:
8. International School of the Hague, Netherlands, IB Curriculum (1 student)
9. International School Of Nice, France, IB Curriculum (2 students)
10. Merchiston Castle School, Edinburgh, Scotland, Edexcel (Pearson)/Cambridge (1 students)
11. Silverline Private School, Limassol, Cyprus, UK national Curriculum (1 Student)
12. North Broward Preparatory School, Florida, USA, IB Curriculum (1 Student)
13. King Solomon School, Israel, IB Curriculum (1 student)
14. The European School of Bergen, The Netherlands, European Curriculum (1 student)

I also provide homework help for school students, and student progress can be assessed through periodic tests as per the requirements of parents or the students themselves.

Note:
Please note that while some of my students may have courses taught in French, German, or Swedish, my primary teaching language is English. As the subject is mathematics, it is generally easy to understand the task at hand, and I explain the answers in English.

Roman

4.74

(23)

Are you looking for professional guidance in Chemistry to improve your understanding and ace your exams? As a fully qualified international high school teacher with over 15 years of experience, I specialize in making complex Chemistry concepts simple and accessible. Whether you're in middle school, preparing for IGCSE or A-Levels, or tackling college-level Chemistry, I’m here to help you succeed.

By booking my Chemistry tutoring sessions, you’ll gain professional support in:
Basic Chemistry Concepts (Atoms, Molecules, and the Periodic Table)
Organic Chemistry
Inorganic Chemistry
Physical Chemistry
Chemical Reactions and Stoichiometry
Thermodynamics and Equilibrium
IGCSE Chemistry Test Prep
A-Level Chemistry Test Prep
SAT Chemistry Subject Test Prep
And more!

Why Choose My Tutoring?
Experienced and Qualified: With over 15 years of teaching experience, I’ve helped countless students build confidence and excel in Chemistry.
Tailored Lessons: Each session is customized to your needs, ensuring a personalized approach to learning.
Engaging Methods: I use interactive tools and real-world examples to make Chemistry both interesting and relatable.
Goal-Oriented Support: From mastering foundational concepts to acing exams, my focus is on helping you achieve your academic goals.

Convenient Online Learning:
My one-on-one online tutoring sessions are conducted via Zoom, providing a flexible and convenient learning experience from the comfort of your home. With cutting-edge tools and clear explanations, I’ll make Chemistry your strong suit.

Get Started Today!
Don’t let Chemistry challenges hold you back. Whether you’re looking for ongoing support or need to prepare for an important test, I’m here to guide you every step of the way. Contact me today to book your first lesson and take the first step toward mastering Chemistry!

Khalil

4.74

(23)

If you’ve ever felt that science and math are difficult, it’s probably because no one showed you how to think like a problem solver.
In my classes, you’ll learn not just formulas or code but how to truly understand concepts, apply them, and build strong logical intuition.

I teach:
• 🔢 Mathematics: From algebra and calculus to applied problem-solving for real-world use.
• 💻 Computer Science: Coding fundamentals (Python, C++), algorithms, and logical thinking for beginners and intermediate learners.
• ⚛️ Physics: Mechanics, thermodynamics, and practical examples that make abstract ideas simple and visual.

As a Software Engineer and Master’s student in Engineering at Nagoya University, I bring both academic knowledge and hands-on experience from real projects. My teaching approach is interactive, visual, and deeply focused on understanding over memorization.

Let’s turn complex problems into clear, step-by-step insights — and make learning something you genuinely enjoy.

Julia

4.74

(23)

Do you want to prepare for a German exam for a visa application in a German-speaking country such as Austria, Germany, Switzerland, Belgium, Luxembourg, Liechtenstein?

And/or are you a scientist looking to learn German?

If you want to improve your German skills for a career in (natural) sciences or your private life, I will offer you individualised lesson to help you reach your goals. I was born and grew up in Frankfurt am Main in Germany. I am professionally trained from Heidelberg University in biotechnology, including molecular biology, mathematics, physics, biochemistry, medical research and bioinformatics/programming. Moreover, I am trained in psychology + philosophy.

We will tailor the lesson to your needs: whether you want to apply for a job position / visum in Germany or your German certificates, study in a German-speaking country, or expand your language skills to be able to communicate with your partner, friend, or read German books. I offer lessons for all ages and backgrounds.

*********************** GERMAN for VISA application **********************
Depending on the country and type of visum, different requirements apply. In Austria, to obtain the Red-White-Red card, a German level of B1 is required.

Among the institutes providing official certificates are the Goethe Institute of Germany, OESD of Austria, TELC, TestDaF, and many more. If you are unsure which certificate would be suitable for you, I will help you by providing more information for taking the decision.

Example requirements Austria:
https://www.oesterreich.gv.at/themen/leben_in_oesterreich/aufenthalt/3/Seite.120260.html

Example requirements Germany:
https://www.make-it-in-germany.com/en/living-in-germany/learn-german/knowledge

Example for Switzerland:
https://www.arbeit.swiss/secoalv/en/home/menue/stellensuchende/berufliche-mobilitaet-in-der-eu-efta---eures/leben-und-arbeiten-in-der-schweiz.html

Nadine

4.74

(23)

(for English description see below)
Hi there,
I offer tutoring for math and science subjects here.
Regardless of whether it's school, university or work - having to learn to pass a subject is neither fun nor much point, as you'll soon forget most of it.
But how can it be better?
I have experienced several times how much of success depends on the emotions associated with learning. That's why I'll try to create an environment in which you feel free to make mistakes - because mistakes are important for learning! I rely on understanding, patience and curiosity to develop a positive relationship with learning rather than applying pressure.

Following the neurobiologist Gerald Hüther, I see the art in setting just the right big challenges to be exciting but not frightening, so that you automatically develop joy in discovery.
I would be happy to have an introductory meeting in order to take your needs and wishes into account from the outset.
Background information about me:
I am a qualified engineer (mechanical engineering) with 3 years of work experience, as well as a master's degree in bionics (cross-sectional discipline between biology and engineering) and a PhD in environmental protection of mountain regions. I was active as a youth leader at the Alpine Club.
I have been giving tutoring lessons on the side ever since I was at school.
I am pleased to meet you.

Hello,
I offer tutoring for maths and science subjects.
Whether at school, university or work - learning to pass a subject is neither fun nor makes much sense, as you soon forget most of it.
But how can it be better?
I have learned many times how much success depends on the emotions associated with learning. That's why I try to create an environment in which you feel free to make mistakes - because mistakes are important for learning! I focus on understanding, patience and curiosity in order to develop a positive relationship with learning rather than exerting pressure.

Following the neurobiologist Gerald Hüther, I see the art in setting just the right amount of challenges to be exciting, but not frightening, so that you automatically develop the joy of discovery.
I would be happy to meet with you to discuss your needs and wishes from the outlet.
Background information about me:
I am a graduate engineer (mechanical engineering) with 3 years of work experience, as well as a master's degree in bionics (cross-sectional discipline between biology and engineering) and have a PhD in environmental protection of mountain regions. I was active in the Alpine Club as a youth leader.
I have been tutoring on the side since my own school days.
I look forward to getting to know you.

Stephanie

4.74

(23)

I like to instill trust and passion for these fields and establish the right learning method for each student. My courses are intended for students aged 6 to 20 years old, ranging from beginner to advanced levels in mathematics, statistics, and/or physics.

Guy

4.74

(23)

I am a certified mathematics teacher in a high school in the Grand Duchy.
I am available to support middle and high school students with difficulties in mathematics and possibly in physics.
Classes can take place online or at the student's home.

Emilie

4.74

(23)

From June 24th, I offer you remedial classes, (possibility in a group) or in private to prepare you or your child for the start of the school year. (group rate can be modified for the price per student)
Currently, I am a student at the University of Liège in the faculty of medicine, I am 19 years old and I am very motivated and passionate about showing my students that science is not that annoying, and even.. c 'is amusing !
I also offer classes during the school year where you can focus on upcoming tests, homework to complete and understand, etc.
But here, I offer you a preparation for the coming year as well as a refresher course if necessary (since if you don't understand the basics, the rest will be even less easy).
(ps: I am bilingual, French and English, German/Luxembourgish courses understandable but explanations in French or English)

Georgio

4.74

(23)

FRENCH longer...

Dear parents, Dear students,

I am writing to express my enthusiasm and commitment to providing private tutoring services in mathematics, physics, chemistry, and science across various levels and educational systems. With a deep passion for these subjects and a dedicated approach to education, my goal is to inspire and guide students toward a deeper understanding and appreciation of these fundamental disciplines.

My long and extensive background in private tutoring has given me a deep understanding and skill in effectively imparting knowledge to students with diverse learning abilities.

Through my tutoring efforts, I strive not only to elucidate complex concepts but also to instill problem-solving skills, critical thinking, and a curiosity-driven approach to learning. I tailor my teaching methodologies to individual learning styles, ensuring that each student achieves a thorough mastery of the subject matter and gains confidence in their academic pursuits.

Additionally, my experience extends beyond classroom teaching. I believe in creating a stimulating environment where students feel empowered to ask questions, participate in discussions, and explore the wonders of science and mathematics.

My ultimate goal as a tutor is to inspire a genuine passion for these subjects while helping students achieve their academic goals. I am committed to providing comprehensive support, personalized guidance, and a rewarding educational experience to every student I work with.

I am confident that my dedication, expertise, and ability to inspire learning will make a significant difference in my students' educational journey. I look forward to the opportunity to contribute to the academic success of those I teach.

I am excited about the prospect of working with students and making a positive impact through private tutoring.

Regards,
Georgio

FRENCH

Dear parents, Dear students,

I am writing to express my enthusiasm and commitment to providing private tutoring services in mathematics, physics, chemistry, and science, spanning various levels and educational systems. With a deep passion for these subjects and a dedicated approach to education, my goal is to inspire and guide students toward a deep understanding and appreciation of these fundamental disciplines.

My long and extensive background in private tutoring has given me a deep understanding and mastery of effectively imparting knowledge to students with diverse learning abilities.

Through my tutoring efforts, I strive not only to explain complex concepts but also to instill problem-solving skills, critical thinking, and a curiosity-based approach to learning. I customize my teaching methods to match individual learning styles, ensuring that each student fully grasps the material and gains confidence in their studies.

Furthermore, my experience extends beyond classroom teaching. I believe in creating a caring environment where students feel encouraged to ask questions, participate in discussions, and explore the wonders of science and mathematics.

My ultimate goal as a tutor is to inspire a passion for these subjects while genuinely helping students achieve their academic goals. I am committed to providing comprehensive support, personalized guidance, and a rewarding educational experience to every student I work with.

I am confident that my dedication, expertise, and ability to inspire learning will make a significant difference in my students' educational journey. I look forward to contributing to the academic success of those I teach.

I am excited to work with students and make a positive difference through private tutoring.

Regards,
Georgio

Noel

4.74

(23)

As I mentioned before, I want to offer tutoring to all kinds of students, whether it's geography, physics, or even music. Everyone is and will be welcome and will receive tutoring tailored to their individual level and expectations.

Kalthom

4.74

(23)

Natural sciences? No problem! 😎
Hi! I help you learn science easily and understandably. I explain complicated topics in a way that makes them click. My goal is for you to truly understand what you're learning – and not just waste time. I love science and I'll show you that learning can be fun!

Matias

4.74

(23)

Mathematics and Physics are foundational subjects that develop logical thinking, problem-solving skills, and a deep understanding of how the world works. However, students often feel overwhelmed by abstract concepts, formulas, and problem sets when they are not explained clearly or applied correctly.
I’ve designed this course as a practical and structured guide to Mathematics and Physics, specifically aimed at helping students truly understand the concepts rather than memorize formulas.

You’ll learn how to break down complex problems step by step, understand the reasoning behind formulas, apply mathematical tools to physical situations, and strengthen your analytical thinking through guided examples and practice exercises.

Saphira

4.74

(23)

As an MSc Astronomy student, I completed university-level courses in Calculus/Analysis and Linear Algebra during my Bachelor’s studies. Over the years, I’ve learned how to explain concepts in a way that feels clear and intuitive, not overwhelming. If you want to pass your course with more confidence, I can help by working directly with your syllabus, lecture notes, assignments, and past exams. Together, we’ll practice efficiently and focus on the types of problems that matter most.

How lessons usually work:
- We start with your level, goals, and what your lecturer expects
- I explain concepts step-by-step, then we practice together with similar exercises
- We’ll write short summaries and you'll get optional "homework" so you improve between sessions

Lessons are available online and in person if you’re nearby. Send me a message with your course name/topic and what you need help with, and I’ll suggest a plan for the first sessions.