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).
A compound is a substance made from two or more elements. that have reacted chemically with each other. Remember this definition as you might need it in the exam! A compound is a completely new material that will often have. totally different properties from the elements that made it. For example. The element sodium is a highly reactive metal. The element chlorine is a yellow-green poisonous gas (non-metal).