Topic 6 - Radioactivity - Isotopes And Elements

Question 1

What do atoms of the same element have in common?

Answer 1

The same number of protons

Question 2

In a neutral atom, what is true about the number of electrons and protons?

Answer 2

They are the same

Question 3

What are isotopes?

Answer 3

Atoms of the same element with different masses

Question 4

How do isotopes differ from each other?

Answer 4

They have the same number of protons but different number of neutrons

Question 5

Give examples of isotopes of carbon.

Answer 5

Carbon-12, Carbon-13, Carbon-14

Question 6

In the notation Ax Z- X, what does A represent?

Answer 6

The mass number (number of neutrons and protons)

Question 7

In the notation Ax Z- X, what does Z represent?

Answer 7

The proton number

Question 8

In the notation Ax Z- X, what does X represent?

Answer 8

The letter of their element

Question 9

In a neutral atom, what happens to the charge?

Answer 9

Electrons cancel out protons

Question 10

If there are N more electrons than protons, what is the charge?

Answer 10

-N

Question 11

If there are N fewer electrons than protons, what is the charge?

Answer 11

+N

Question 12

What does not change for a certain element?

Answer 12

The number of protons