Question

Classify each of the following as an element, a compound,or a mixture, copper,water, nitrogen,and sulfur

Answer 1

Answer: copper, nitrogen,and sulfur : element

water : compound

Explanation:

Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions. Example: Sulphur (S), copper (Cu), Nitrogen (N).

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: water $(H_2O)$