The metals Metals are the elements that have less than four electrons in their outermost energy levels, During the chemical reactions, the atoms of the metallic elements tend to lose their outermost electrons, and...
Electronegativity is the ability of the atom in the covalent molecule to attract the electrons of the chemical bond towards itself, There is an inverse relationship between the atomic size of the atom of...
The elements The scientists classified the elements according to their properties to facilitate their study and to find a relationship between the elements, and their chemical and physical properties.
