The parts of the word: noun, verb, and particle, and the signs of each one of them (the signs by which we know that the word is a noun, such as accepting the definite article, such as the phone is a noun because it is before the definite article, and so on, etc. The signs that indicate the nominal or verbal nature of the word Then the divisions of the word: singular, dual, plural, masculine and feminine

I will teach in an attractive and professional manner how to understand the basics of chemistry (atomic structure - electron configuration in its two types, total and sub-atomic numbers and weight - metals, non-metals, and noble gases) Types of chemical bonds 1/ The bond (covalent in its various types (ordinary single, double and triple) (coordinating) (hydrogen) 2/ Ionic bond