1.1 Atoms

Question 1

Name the particles that are found in the nucleus of an atom

Answer 1

Proton and Neutron

Question 2

What is the charge of a proton?

Answer 2

Positive 1, or +1

Question 3

What is the charge of a neutron?

Answer 3

Neutral, or 0

Question 4

What is the charge of an electron?

Answer 4

Negative 1, or -1

Question 5

What is the relative mass of a proton?

Answer 5

1

Question 6

What is the relative mass of a neutron?

Answer 6

1

Question 7

What is the relative mass of an electron?

Answer 7

0.1/2000, or negligible

Question 8

What is the overall charge of an atom?

Answer 8

Neutral, or 0

Question 9

Why do atoms have a neutral charge?

Answer 9

Because they have the same number of positive protons and negative electrons, so the charges cancel out

Question 10

What does the atomic number of an atom tell you?

Answer 10

The number of protons the atom has

Question 11

What does the mass number of an atom tell you?

Answer 11

The total number of protons + neutrons the atom has

Question 12

How can you use the atomic number and mass number of a given atom, to work out how many neutrons it has?

Answer 12

Number of neutrons =
Mass number- atomic number

Question 13

Which particle determines what element an atom is?

Answer 13

Proton

Question 14

What sub-atomic particle does NOT have a charge?

Answer 14

Neutron

Question 15

What do we call an atom that has a positive or negative charge?

Answer 15

An ion

Question 16

What do electrons orbit the nucleus in?

Answer 16

Energy shells

Question 17

If an atom has 6 protons and 5 electrons, what will its charge be overall?

Answer 17

+1