Radioactivity and Ionsisng Radiation

Question 1

Fill in the gap:

In an atom, the number of ________ is _____ to the number of electrons

Answer 1

1. Protons

2. Equal

Question 2

What is positron radiation?

Answer 2

Positively charged beta radiation

Question 3

Fill in the gap:

Positron and electrons are ________________

Answer 3

1. Antiparticles

Question 4

When does B- decay occur?

Answer 4

When there are too many neutrons

Question 5

When does B+ decay occur?

Answer 5

When there are too few neutrons

Question 6

Where does alpha decay happen?

Answer 6

In a heavy nucleus

Question 7

When is gamma radiation emitted?

Answer 7

When nuclei have too much energy

Question 8

What is the composition of quarks in a proton?

Answer 8

Two up one down

Question 9

What is the composition of quarks in a neutron?

Answer 9

Two down one up

Question 10

What is the composition of quarks in an electron?

Answer 10

Three down

Question 11

What does PET scanning aid?

Answer 11

The diagnosis of illness

Question 12

What are two harmful effects of radiation?

Answer 12

1. Tissue damage

2. Possible mutations

Question 13

Fill in the gap:

Radiation can be used ______ and externally to treat tumours

Answer 13

1. Internally