Question

Which of the following is the best definition of an atom?

Answer 1

C would be correct because atoms can be either negative or positive charged and they can make up living and nonliving things

Answer 2

The answer to your question is C.) Small particles that make up all matter. 

This is the answer because:

B is incorrect. An atom is both positive and negative as it has both protons and electrons. So B is automatically out because it only says negative. 

A is incorrect. Although it is true that atoms are charged particles, they don't just make up living things. They make up all matter. 

So you are left with C which is true that atoms are both small particles and they make up all matter .

Hope this helped!