Question

what is the smallest particle of an element that still has all the properties of that element? a atom b electron c pure substance d proton

Explanation:

An atom is the smallest particle of an element that retains all the chemical properties of that element. An electron is a sub - atomic particle (carries a negative charge) and does not have the properties of the element. A pure substance can be an element or a compound. A proton is also a sub - atomic particle (carries a positive charge) and does not have the properties of the element.

Answer:

A. atom