Question

A substance that is composed entirely of atoms which all have the same number of protons in their nuclei is known as _______.

A. an element
B. a molecule
C. a neutron
D. a compound

Answer 1

For example, a collection of atoms all of which have one proton on their nuclei is called Hydrogen.

If all atoms have 79 protons we have gold.

If all the atoms have 6 protons, we have carbon. Diamonds are made of carbon.

Now: Hydrogen, Gold and Carbon are all examples of what?

Answer 2

elements