Topic 3 - Geological time

Question 1

At the centre of every atom are smaller, sub-atomic particles What are these called?

Answer 1

Protons and neutrons

Question 2

What part of the atom does the protons and neutrons make up?

Answer 2

The nucleus (plural nuclei)

Question 3

What does The number of protons in the nucleus define?

Answer 3

whether the atom is an atom of hydrogen (with 1 proton), helium (2 protons), carbon (6 protons), or some other chemical element.

Question 4

The neutrons in the nucleus of an atom can vary, what are Variants of a given element with different numbers of neutron called?

Answer 4

Isotopes