Attraction Between Anions and Cations(lone valence electron is transfered to a different atom)
Anions
Net negative Charge
Cations
Net Positive Charge
Example: An uncharged Sodium atom pairs up and gives a valence electron to a charged Chloride Atom to create NaCl
Covalent Bond
Sharing of Valence Electrons
Single Bond: Sharing of one pair of valence electrons
Double Bond: Sharing of two pairs of Valence electrons
Molecules
Molecule: Combination of 1 or more atoms to form a bond
H + H=H2
Compound: Combination of more than 1 element
Ex: Sodium plus Chloride=NaCl
Ions
an atom or molecule with a net electric charge ready to gain or lose one or more valence electrons
Anabolism and Catabolism
Anabolism: a process which requires energy and produces complex molecules from simpler ones
Catabolism is the breaking down of things - a series of degradative chemical reactions that break down complex molecules into smaller units, and in most cases releasing energy in the process.