Lindsey Kunze

Question # 3!!!!!

3 Types of bonds: Covalent, ionic, and metallic bonds

Covalent bond is a chemical bond that forms by sharing one or more electrons between atoms. Covalent bonds hold atoms together. Covalent bonds are the attraction and repulsive forces between atoms when they share electrons.
Characteristics:
low melting point
low boiling point
soluble in nonpolar solvents
most common in organic compounds
do not conduct electricity
Example
H2 and O2

Ionic bonds involves a metal and a nonmetal. In ionic bonds electrons are completely transferred and either lose or gain negatively charged electrons. The metal gives one or more electrons which causes a positively charged atom with a stable electron congiration. These electrons enter the nonmetal which causes it to form a negatively charged ion which has a stable configuration also. The attraction between the opposite charged ions causes them to come together and form a bond.
Characteristics
high melting points
conduct electricity
dissolve easily in water
well defined crystals
high boiling point
Example
NaCl

In metallic bonds, an atom achieves a stable configuration by sharing electrons of its outer shell with other atoms. Metallic bonds overcome elements in which the valence electrons are not tightly bounded with the nucleus, which mainly occurs in, metals. Each atom in a metal crystal all the electrons with its valence shell to all the other atoms.
Characteristics
thermal
conduct electricity
high melting point
high boiling point
strong
malleable
opaque
Example
Zn and Fe