Question

Paul is studying a substance that is made out of only one element. This means that
A.
all the atoms in the substance are similar to each other.
the substance is too small to be seen with the human eye.
the substance does not have any energy
OD.
there are many different types of atoms in the substance

Answer 1

Answer:

A. All the atoms in the substance are similar to each other.  

Explanation:

All the atoms in an element are similar to each other.

B. is probably wrong. Paul could be a brilliant student who can study substances on a scale that can be seen only under a microscope.

C. is wrong. All substances have energy.

D. is wrong. If there are many different types of atoms, the substance is a compound or a mixture.