Question

aluminum is an element. which best describes what makes up a sample of aluminum?
○ one kind of atom
○ two different kinds of atoms
○ all carbon-based atoms
○ a carbon atom and non-carbon atoms

Explanation:

An element is defined as a pure substance that consists of only one type of atom. Aluminum is an element, so a sample of aluminum should be made up of only aluminum atoms (one kind of atom). The other options are incorrect: two different kinds of atoms would be a compound or a mixture of elements, carbon - based atoms are related to organic substances (aluminum is not carbon - based), and a carbon atom with non - carbon atoms is also not relevant to aluminum.

Answer:

A. one kind of atom