outer energy level electrons... called valence electrons
ionic bond
the kind of bond that share electrons is called covalent bond
The tendency of an atom to attract electrons is called electronegativity. It is a measure of an atom's ability to attract and hold onto electrons in a chemical bond.
The electrons of an atom that are involved in a chemical bond are located in the outermost energy level, known as the valence shell. These electrons are called valence electrons and determine the atom's reactivity and ability to form bonds with other atoms.
Linus Pauling defined electronegativity as "the ability of an atom in a molecule to attract electrons to itself."
Ionic
A covalent bond is formed when electrons are transferred from atom to atom.
electronegativity
Na
Ionic bond is formed by the transfer of an electron. In an ionic bond, one atom loses electrons to become positively charged (cation) while another atom gains those electrons to become negatively charged (anion), leading to an attraction between the two oppositely charged ions.
Electronegativity
When atoms share electrons, the electrical attraction of an atom for the shared electrons is called the atom's electronegativity. Electronegativity is a measure of the ability of an atom to attract shared electrons towards itself in a chemical bond.