Atoms combine with each other forming molecules through chemical bonds, Ionic bond produces compounds molecules only and doesn’t produce elements molecules because the ionic bond arises between two different atoms, The covalent bond produces...
The most stable atoms are those of noble gases such as helium, neon, argon …..etc, Because their outermost energy level is filled with electrons, so, the atoms of these electrons do not undergo any...
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...
Living organisms life depends on the occurrence of chemical reactions inside their bodies , these reactions are called metabolism , Metabolism is necessary for growth , repairing the damaged tissues and obtaining the energy...
