Chemical Bonds

Formation of Compounds

• Compounds – different elements that chemically bonded together
• Octet electron arrangement – electron arrangement of an atom where the outermost occupied shell is filled with eight valence electrons
• Duplet electron arrangement – electron arrangement of an atom where a single shell filled with two valence electrons

Example:
Compound water is hydrogen and oxygen atoms are chemically bonded together.
Stability of Noble Gases

• Atom of noble gas does not gain, lose nor share electrons with other atoms.
• Noble gas atoms do not combine with atoms of other elements to form compounds or with each other to form molecules.
• Noble gases are chemically unreactive.
• Noble gases exist as monoatomic.

Chemical Bonds

Chemical Bond

Types of chemical bonds:

• ionic bonds (metal + non-metal)
• covalent bonds (non-metal + non-metal)

Atoms of other elements can achieve the stable octet electron arrangement by

• transfer of electrons
• sharing of electrons