Small Cell Lung Cancer Life Expectancy. In small cell lung cancer 'extensive stage', the average life expectancy is believed to be 9 to 12 months; and if the person does not opt for proper treatment, it can go down to 4 to 6 months.Advertisement.isten. In small cell lung cancer 'extensive stage', the average life expectancy is believed to be 9 to 12 months; and if the person does not opt for proper treatment, it can go down to 4 to 6 months.
A chemical element bonded to an identical chemical element is not a chemical compound since only one element, not two different elements, is involved. Examples are the diatomic molecule hydrogen (H 2) and the polyatomic molecule sulfur (S 8).
1.1 (also chemical compound) A substance formed from two or more elements chemically united in fixed proportions: a compound of hydrogen and oxygen lead compounds. More example sentences. 1  The layers of plants and animals slowly broke down into simple substances called hydrocarbons, compounds of hydrogen and carbon..1 (also chemical compound) A substance formed from two or more elements chemically united in fixed proportions: a compound of hydrogen and oxygen lead compounds. More example sentences. 1  The layers of plants and animals slowly broke down into simple substances called hydrocarbons, compounds of hydrogen and carbon.