Question

what is the smallest unit of an element that still re- tains the properties of that element?
a electron
b atom
c neutron
d proton

Explanation:

An atom is the smallest unit of an element that retains the chemical properties of that element. Electrons, neutrons, and protons are sub - atomic particles that make up an atom and do not on their own possess the properties of the element.

Answer:

B. atom