Topic 1 - Atomic Structure

Question 1

What is an atom?

Answer 1

The simplest particle of an element that can exist on its own in a stable environment.

Question 2

What are atoms made of?

Answer 2

Protons, electrons and neutrons

Question 3

Where are protons, neutrons and electrons found in an atom?

Answer 3

Protons and neutrons are in the nucleus. Electrons are in the shells.

Question 4

What’s the relative charge and mass of subatomic particles?

Answer 4

Relative mass | relative charge
Proton 1 +1
Neutron. 1 0
Electron. 1/1840 -1

Question 5

Where are atomic and mass numbers written on a periodic table?

Answer 5

The mass number is on top of the elements symbol and the atomic number is at the bottom.

Question 6

How do you figure out how many subatomic particles are in an atom of an element using a periodic table?

Answer 6

Number of protons = atomic number
Number of neutrons = mass number - atomic number
Number of electrons= number of protons (in an atom)

Question 7

What is an isotope?

Answer 7

Atoms that have the same number of protons but have different amounts of neutrons.

Question 8

How do you calculate relative atomic mass?

Answer 8

Relative atomic mass = sum of (mass number x abundance) /

Sum of abundance

Question 9

What is a compound?

Answer 9

A substance formed when 2 or more elements are chemically combined