Question

Which of the following is a substance made up of only one type of atom?

Cell
Compound
Element
Water

Answer 1

Element

Step-by-step explanation:

A pure substance is something that occurs in nature. An element is made up of one type of atom only and cannot be split further. A compound has the combined properties of the elements from which it is made. Atoms show the macro properties of an element.

Answer 2

An element is made up of only one type of atom.