Theories explaining the covalent bond The concept of the covalent bond developed according to our knowledge about the electron properties, from the theories that are explaining the formation of the covalent bond are: The...
The most stable atoms are those of noble gases such as helium , neon , argon …..etc , Because their outermost energy level is completely filled with electrons , so , the atoms of...
Particles of any material are moving in a continuous random motion , this type of motion differs according to the state of matter , So , we find that Solid molecules move in vibrational...
Each substance stores an amount of energy inside it , This amount of energy called the internal energy , This amount of energy is the summation of three types of energy which are the...
Heat and temperature Heat is a form of energy , The flow of heat from one position to another depends on the difference in temperature between them, The atoms or molecules of substances are...
The chemical compound is represented by a chemical formula which is a simple symbolic formula that indicates the element percentage and the number of atoms or ions of each element , The chemical compound is...
