Atoms

Question 1

What are the three subatomic particles atoms are made up of?

Answer 1

Protons
Neutrons
Electrons

Question 2

What is the relative mass of protons?

Answer 2

1

Question 3

What is the relative mass of neutrons?

Answer 3

1

Question 4

What is the relative mass of electrons?

Answer 4

0.0005

Question 5

What is the relative charge of protons?

Answer 5

+1

Question 6

What is the relative charge of neutrons?

Answer 6

0

Question 7

What is the relative charge of electrons?

Answer 7

-1

Question 8

What is the nucleus of an atom?

Answer 8

The middle of the atom
Contains protons and neutrons
It has a positive charge because of the protons
Almost all the mass of the atom is concentrated in the nucleus
Compared to the size of the atom the nucleus is tiny

Question 9

What do electrons move around the shell in?

Answer 9

Shells

Question 10

What is the charge of all atoms?

Answer 10

No charge

Question 11

What does the atomic number tell you?

Answer 11

How many protons an atom has, in a neutral atom this is also the number of electrons

Question 12

What does the mass number tell you?

Answer 12

The number of protons and neutrons in an atom

Question 13

How do you work out the number of neutrons in an atom?

Answer 13

Subtract the atomic number from the mass number

Question 14

What are isotopes?

Answer 14

Different forms of the same element, which have the same number of protons but a different number of neutrons

Question 15

How do you work out an isotopic abundance?

Answer 15

Multiply the relative isotopic mass by its isotopic abundance and add up the results
Divide by the sum of the abundance as (if it was percentages you would divide by 100)