التفاعلات الكيميائية: الرموز والصيغ الكيميائية واهميتها

From 2.15 € /h

تشير الصيغة الكيميائية إلى نوع وعدد الذرات فى جزئ المادة التى يرمز لها برمز معين وبالتالى نتعرف على شكل المادة سواء كانت منفردة او مركبة مع نفسها او مادة أخرى
مثال جزئ الماء يرمز لها بالرمز H2O حيث يمثل الرمز H إلى ذرة الهيدروجين والرمز O إلى ذرة الأكسجين والرقم 2 إلى عدد ذرات الهيدروجين الموجودة فى جزئ الماء

Extra information

جميع التفاعلات الكيميائية تستخدم الرموز الكيمائية لتسهيل التعبير والوصول إلى التفاعل

Location

Online from Saudi Arabia

Age

Children (7-12 years old)

Teenagers (13-17 years old)

Student level

Beginner

Intermediate

Advanced

Duration

45 minutes

60 minutes

The class is taught in

Arabic

Skills

Science

Availability of a typical week

(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

Mohamed

4.94

(17)

الفيزياء والكيمياء هي البوابة لفهم جميع العلوم، كطالب علوم سوف تحتاج إلى أن تكون قادرًا على فرز العديد من الميزات المعقدة لتصبح طالبًا علميًا حقيقيًا يتمتع بعقل ناقد وفضولي. ولهذا السبب قمت بتصميم هذه الدورة لمساعدة الطلاب على الاستعداد لامتحاناتهم والعام الدراسي القادم لملء الفجوات التي لديهم في الرياضيات والعلوم.
أود أن أخبرك أنني باحث شاب ويمكنني أيضًا مساعدتك في اكتساب المعرفة الأساسية ببرنامج Microsoft Office والبرامج الأساسية الأخرى لمسيرتك المهنية.

Anh

4.94

(17)

If you're preparing for resit exams and want to ensure you succeed, I’m here to help. These tailored sessions are designed specifically to support you in mastering the material and boosting your confidence. We'll focus on addressing any areas of concern, revisiting missed fundamentals, and reinforcing your understanding to tackle any future challenges with ease.

Whether you're tackling:
• A-Levels
• International Baccalaureate (IB)
• Advanced University courses
• GCSEs

You’ll gain the confidence and knowledge to master the curriculum and approach future challenges with ease.

Contact me now for availability, and let's schedule your first session soon. I look forward to working with you!
__________________________________________________________________________________

I'm actively supporting students from top high schools and universities worldwide, including:

High Schools:
• International School of The Hague (ISH)
• The British School in The Netherlands (BSN)
• The British School of Amsterdam (BSN)
• International School Rijnlands Lyceum Oegstgeest (ISRLO)
• The European School The Hague (ESH)

Universities:
• ETH Zurich - Swiss Federal Institute of Technology (ETH Zurich)
• Imperial College London (+ Business School) (ICL)
• University College London (UCL)
• King’s College London (KCL)
• Delft University of Technology (TUDelft)
• University of Amsterdam (UvA)
• University of Groningen (RUG)
• Leiden University (LU)
• Hogeschool Inholland University of Applied Science (Inholland)
• Queensland University of Technology (QUT)
• University of Queensland (UQ)
• Griffith University (Griffith)
__________________________________________________________________________________

My name is Anh, and I was born and raised in the U.K. With over 10 years of international experience tutoring Maths, Sciences, and Engineering from Middle School to University Level, I’ve supported over 80 students worldwide in unlocking their full potential.

I have a fun, ambitious, and outgoing personality, and I’m passionate about music, cooking, and trying new things. In my tutoring and mentoring, I am patient, adaptable, and committed to meeting the unique needs of each student.

I work as an Engineering Specialist/Consultant, holding:
• Master’s degree in Aeronautical Engineering from Imperial College London,
• AAA* A-Level in Further Maths and Physics,
• Straight As and A*s in (GCSE) Maths, Physics, Chemistry, Biology, English, and Geography.

Having been mentored and tutored myself, I understand the challenges students face. Through my own experiences of overcoming obstacles and achieving success, I’m passionate about helping others do the same. Let’s work together to ensure you reach your full potential, both academically and personally!

Patricia

4.94

(17)

Je suis mademoiselle Patricia, je suis native, francophone (🇫🇷) ayant comme activité en dehors de mes études le tutorat. J'enseigne la langue française ( FLE) et la langue anglaise ( ESL). J'ai également des aptitudes à enseigner à répéter des apprenants en mathématiques (📐📏✏🔢), chimie (👩‍🔬🧑‍🔬🧪📗), biologie 🫁🫀🦷🥼🔬(et/ou sciences naturelles🌏🍀🪰🪱🦠🥽), français (🇫🇷) et anglais (🇬🇧).
Si vous êtes un parent et vous recherchez activement un tuteur pour encadrer vos enfants (aides aux devoirs ou répétions), je suis à votre disposition. Ayant une grande expérience que j'ai acquise en faisant du baby-sitting et en servant dans des groupes de jeunesses, j'ai pu m'imprégner de la psychologie des jeunes et enfants et j'ai cette capacité à toucher du doigt leurs difficultés. L'apprentissage n'étant pas l'armée ou une corvée, en plus d'être un excellent tuteur pour eux, je peux être également cette bienveillante compagnie qui leur permettra de libérer leurs potentiels.
Mon annonce concerne les apprenants du système francophone (français, belge, canadien) et le système bilingue (français, anglais).
A travers le premier cours, je me mettrais en évidence mes compétences citées plus haut et si vous être conquis, nous pourrons continuer ensemble.

Niveau concerné par mon annonce:

- niveau primaire (toute matière)

- niveau collège ( Anglais, français, mathématiques), biologie (et/ou sciences naturelles), chimie

- niveau lycée (anglais, biologie)

Si vous êtes intéressé par cette annonce, commentez par un plus, ou écrivez moi un message en privé et ensemble rendons vos enfants meilleurs à l'école.

Mademoiselle Patricia ,

Mohamed

4.94

(17)

تدريس منهج الرياضيات كاملا للطلبة بداية من الصف الثالث الابتدائي حتى الصف الثالث الإعدادي مع متابعة مستوى الطالب و العمل على الدروس التي يواجه معها صعوبة في الفهم، مع التركيز على الحل لإتقان أي مهارة يجب على الطالب إتقانها، ستشعر بالثقة اللازمة قبل دخولك الامتحان.

Chiwila

4.94

(17)

As a dedicated tutor with extensive experience in preparing students for standardized exams such as the SAT, GMAT, and SSAT, I understand the unique challenges that each of these tests presents. My approach is comprehensive and focuses on building a strong foundation in critical areas such as Mathematics, Quantitative Reasoning, Verbal Skills, and Analytical Writing. Each program I develop is tailored to the specific requirements of the exam, ensuring that students are well-prepared and confident on test day.

Having a deep understanding of the test formats and question types allows me to provide personalized strategies that target each student's individual strengths and weaknesses. I believe that every student has a unique learning style, and my goal is to enhance their test-taking skills while improving their time management. By fostering a supportive learning environment, I aim to boost students' confidence and empower them to achieve top scores.

My tutoring sessions incorporate a variety of effective methods, including real exam questions and timed practice tests. This hands-on approach allows students to familiarize themselves with the types of questions they will encounter, making the actual exam feel less daunting. I teach proven techniques for tackling even the most challenging problems, ensuring that students feel equipped to handle any question that comes their way.

One of the key components of my tutoring is helping students develop effective study habits. I provide guidance on creating a structured study plan that maximizes their preparation time and aligns with their personal goals. This structured approach not only keeps students on track but also helps them build a sense of accountability, which is crucial for success.

In addition to academic preparation, I also focus on the psychological aspects of test-taking. Many students experience anxiety leading up to exams, which can affect their performance. I teach relaxation techniques and mental strategies to help manage stress, allowing students to approach their exams with a calm and focused mindset. By addressing both the academic and emotional challenges of test preparation, I equip students with a well-rounded toolkit for success.

Feedback is an essential part of the learning process, and I make it a priority to provide constructive and actionable insights during our sessions. After each practice test, I conduct a thorough review of the results, highlighting areas for improvement while also acknowledging progress. This continuous feedback loop helps students understand their growth and keeps them motivated throughout their preparation.

My commitment to student success goes beyond just teaching content. I aim to inspire a love for learning and self-improvement in each of my students. Many of my former students have gone on to achieve their academic goals, securing places at prestigious universities and programs. Their success stories are a testament to the effectiveness of my tailored approach and the dedication I bring to each tutoring session.

If you're looking to master the SAT, GMAT, or SSAT with confidence, I invite you to book a session now. Together, we will develop a customized learning plan that suits your individual needs, ensuring that you are not only prepared to face the test but also equipped to excel and reach your highest potential. With my guidance and your commitment, we can achieve outstanding results. Let’s embark on this journey to success together!

Ebtihal

4.94

(17)

أنا طالب ماجستير من جامعة ووهان للتكنولوجيا، ووهان، الصين
قمت بدراسة بعض المقررات المتعلقة بعلوم المواد، وتكنولوجيا النانو، والفيزياء الحاسوبية، والبصريات المتقدمة، بالإضافة إلى التدريب على الأعمال المخبرية مثل إعداد وجمع البيانات، وإجراء الاختبارات والأبحاث، وكيفية الاستعداد لكتابة الأوراق العلمية.
يمكنني أيضًا تدريس طلاب المدارس الثانوية.
لا تتردد بالاتصال بي لمزيد من معلومات. أتمنى لكم كل التوفيق.

Michael

4.94

(17)

Expert Science & Chemistry Tutor – IGCSE | A-Level | IB | KS3
Online & In-Person Lessons Available in Madrid.

Are you looking for a dedicated, experienced, and results-driven science tutor to help you or your child excel in school or exams? Whether you're preparing for IGCSE, A-Level, IB, or Coordinated Sciences, I’m here to help you achieve your goals.

✅ Subjects Offered:

Chemistry (IGCSE, A-Level, IB, Edexcel, AQA, Cambridge)

Coordinated Sciences (Double Award)

General Science (KS3 & KS4)

Exam preparation and lab skills (Paper 3/ practical-based support)

🧪 About Me:
I’m a qualified and passionate science teacher with over 10 years of experience teaching in international schools across Spain, the UK, and the Middle East. I currently work at a leading international school in and specialise in Chemistry and Coordinated Sciences.

🌟 What You’ll Get:

Personalized 1:1 support tailored to your learning style

Exam-focused strategies to boost confidence and grades

Simplified explanations of complex topics

Friendly, patient, and engaging lessons

Help with homework, projects, revision, and lab reports

📍 Location:

Online worldwide via Zoom/Google Meet

In-person in Madrid, flexible hours available

🎯 Who is this for?

Students aiming for top grades in science and chemistry

Those who need extra support understanding key concepts

IB or A-Level students needing help with Internal Assessments or lab work

📩 Message me today to book your first lesson or ask any questions. Let’s boost your science skills and exam success together!

Dorcas

4.94

(17)

Passionate and dedicated teacher with five years of experience fostering an engaging and inclusive learning environment. I'm committed to promoting student success through personalized instruction, differentiated learning strategies, and active student engagement. Proven track record of implementing innovative teaching methods and achieving measurable improvements in student academic performance.
I offer home tution services for igcse and other curricular.
I tutor learners in both lower and upper grades English, Maths and Science and other subjects if the need be.
Duration per session is an hour and above.

Mahmoud

4.94

(17)

مرحباً ايها الطلاب! هل تجدون صعوبة فى تعلم مواد العلوم وتحديداً مادة الكيمياء. ربما يرجع هذا الى أن الكيمياء تحتوى على بعض المفاهيم أو المصطلحات الصعبة أو المعقدة. اذا كنتم من هولاء فلا داعى الى القلق!! أهلا ومرحباً بكم طلابى فى المكان المناسب لحل هذا المشكلة وذلك عن طريق دروس تبسيط العلوم وخاصة الكيمياء. سنتعلم معاً من خلال هذه الدروس كيفية التعامل مع الامور و المصطلحات صعبة الفهم، وذلك لانى عندى خبرة كبيرة تمتد الى اكثر من 15 عام في نقل المفاهيم المعقدة بطريقة واضحة وسهلة وبسيطة. هدفي هو جعل العلوم والكيمياء بشكل عام والكيمياء العضوية بشكل خاص رائعة ومفهومة للجميع. كمعلم متفاني، أقوم بإنشاء بيئة تعليمية تفاعلية ومحفزة لطلابي باستخدام احدث الطرق. عندى استعداد لمشاركة شغفي وتوجيه كل طالب نحو التفوق و النجاح في مجال العلوم والكيمياء العضوية وفى الدراسة بشكل عام حيث أننى اعمل كموجه للطلاب فى أحدى الموسسات الدولية.

هذا الى جانب أن لدي مهارات اتصال وعرض مميزة وأتحلى بالصبر والهدوء عند التدريس. بالأضافة الى أنى أتابع باستمرار تقدم طلابي وأقيم فهمهم بانتظام من خلال الحل المستمر للأسئلة الموضوعية حيث أننى أهتم بالفهم أكثر من الحفظ. وعلى الجانب الاخر، فأنا أيضاً أحافظ على المتابعة الجيدة مع أولياء الأمور. نهجي في التدريس موجه نحو تحقيق أعلى النتائج، مع التركيز على مساعدة الطلاب على فهم و إتقان المعلومات.

Christoph

4.94

(17)

Are you looking for help with mathematics?

To prepare for an exam, accomplish a coursework, a bachelor's or master's thesis?

I studied mathematics and physics (PhD) and have been teaching for 10 years. I have already
helped more than 150 students succeed.

I make the lecture material more understandable using concrete examples. I correct papers, explain the best methods to solve tasks or put up my own exercices to achieve the necessary level.

I would be happy to help you write extensive papers.

I am an affable character and am completely committed to one goal: the success of the
student.

Vincent

4.94

(17)

Science includes all natural science subjects; PHYSICS, CHEMISTRY, BIOLOGY and MATHEMATICS . PHYSICS deals with MECHANICS of OBJECTS while CHEMISTRY deals with CHEMICAL CHANGES of different REACTIONS.On the other hand BIOLOGY is the study of LIFE PROCESSES and different MATERIALS that SUPPORTS LIFE.Whereas , MATHEMATICS is a subject that explains DIFFERENT CONCEPTS using NUMBERS and VARIABLES.

Kelvin

4.94

(17)

Hi, Tutor Kelvin here.
Your MATHS and SCIENCE Tutor.

MATHS;
Many students fail Maths because of unsharpened analytical skills.
As an experienced Tutor, my aim is to bridge in that gap.No, student must ever be troubled with a concept that do have a solution .

Q.Why you will love Maths after the lessons?
1.I will help break down concepts to the level of your understanding.
2.I will make sure that I explain all the steps required per topic.
3.At the end of the day, I could've made sure you know and understand the requirements for each question.This will be achieved by exposing you my student to final examination papers.

NOTE; I am a straight forward Tutor who strives to bring out the best in every student on time.I am always innovative by using interactive mode of Teaching Methodology.

I use well structured notes and past papers.Once I teach my student/s a topic, I make sure the lesson is concluded by attempting Examination Questions together.
In addition, each lesson takes 1 hour (60 minutes) duration.That time , is fair enough to have had all the lesson objectives met.
I look forward to take you through in SCIENCE which comprises of:
•Chemistry
This branch mainly contains atomic structure, the periodic table, rates of reactions, oxides, electro chemistry, acids, bases and salts etc
•Physics
This branch contains matter and how energy is converted from one form to another.That means, force is included, electricity, motion, electronics, uses of metals, among others.
•Biology
This branch of science deals with living and non living things.Scope of living things; Cells, tissues,organs, systems, organisms such as trees, frogs, worms, bacteria, human beings etc
On the other hand, non living things includes; Air, Soil, Water and Sun Light

Note:
I take keen interest in providing quality lessons to all students regardless of their conditions.In addition, I make sure I use the best tactics that suits each student for effective learning.
I also apply where necessary the utmost psychological skills to each student so that i ignite the learning zeal.
That ensures meeting the need of each student so that I help bring out the best in each student.
Every student is valued 🏆 and I strive to bring out his/her best in approaching all the science based subjects
Booking me for a class guarantees excellent grades.
Once you book me, I look forward to take you through as your Tutor.
Best regards,
~Kelvin

Rimsha

4.94

(17)

I am a dedicated tutor with experience teaching Math, English, and Science to school-going children. I focus on building strong basics, improving understanding, and boosting confidence through clear explanations and regular practice. I adapt my teaching style according to each child’s learning pace and make lessons engaging.

Maryb

4.94

(17)

Understanding the environment around us as we study Biology, Chemistry and basic Scientific Literacy. Ace your exams with topic by topic breakdowns from checkpoint, igcse, lower secondary to As and A2. Virtual practical sessions and exam revision.

Noor

4.94

(17)

Today is your best day!
I have 14 years experience of teaching Mathematics . I teach from grade 1 to grade 12 . i can teach the age group 4 years old to 45 years old student. I love teaching and i love to explore in teaching.
✅Qualifications:
• Bachelor’s degree in Education (B.Ed.) with a specialization in Math

• Master degree in Science (M.Sc.) Mathematics

• Bachler's degree in Science ( B.sc) Physics

• Proficient in computers, which makes me ideal for online tutoring — Clear, Visual Explanations – Uses visuals, games, mental math, and logical steps to make even tricky concepts simple.

✅Experience:
• 14 years of Tutoring: I’ve had the privilege of guiding and inspiring over a thousand students worldwide. This includes both classroom teaching (14 years in schools)

• Classroom Teaching: I gained valuable experience during 7 years of teaching in a India and 7years in Dubai .

✅CURRICULA & EXAMS I SUPPORT:
i can teach in Math from Basic To Advance level

✔️Algebra , Pre Algebra ,Elementary Algebra ,Intermediate Algebra , Algebra 1 , Algebra 2, College Algebra

✔️Pre-calculus .

✔️GCSE, IGCSE, IB Math (PYP and MYP) , IB AA SL

✔️ O-Levels, Edexcel, AQA

✔️ ACT Math, GED, NAPLAN,

✔️CBSE, ICSE

✔️Singapore, US Common Core, UK, Australian Curriculum.

✔️Trigonometry ( till Garde 10)

✔️General Mathematics

✔️Honorable Geometry and INTERMEDIATE

✔️ UK entrance Exam Preparation , SASMO exam (Singapore and Asian Schools Math Olympiad)

✔️ European baccalaureate system
✅Regions I Cover:

I offer tutoring services to students in the US, UK, UAE, Australia, New Zeeland, Hong Kong, Singapore, Malaysia, Canada, Europe, Switzerland, Taiwan, Japan, India, and beyond.

🖐am providing practice worksheet after every class for quick revision and self confidence in Math .

🚀There Is nothing to fear about Math it’s all about Understanding and Practice, join me to help you find your new Passion!