Radioactivity- Radiation

Question 1

Alpha radiation α (a ______ nuclei or loss of two _______ and two ________) highly _________, low ___________, stopped by _____, range in air _ cm.

Answer 1

Alpha radiation α (a helium nuclei or loss of two protons and two neutrons) highly ionising, low penetration, stopped by paper, range in air 5 cm.

Question 2

How do you calculate alpha decay?

Answer 2

Atomic mass decreases by 4
Atomic number decreases by 2

Question 3

Beta radiation β (_________ formed when a neutron turns into a proton) mid _________
ability and mid ____________, stopped by _________, range in air _ metre

Answer 3

Beta radiation β (electron formed when a neutron turns into a proton) mid ionising
ability and mid penetration, stopped by aluminium, range in air 1 metre

Question 4

How do you calculate beta decay?

Answer 4

Atomic mass stays the same
Atomic number increases by one

Question 5

Gamma radiation γ (___ wave) low ________ ability, high ___________, stopped by
several inches of ____ or metres of ________, range in air _________.

Answer 5

Gamma radiation γ (EMS wave) low ionising ability, high penetration, stopped by
several inches of lead or metres of concrete, range in air unlimited.

Question 6

Background radiation is ___-_____ radiation.

Answer 6

Background radiation is low-level radiation.

Question 7

______________ is the unwanted presence of materials containing ____________ atoms on other materials. The object is ____________ as long as the contaminant is in contact with it.

Answer 7

Contamination is the unwanted presence of materials containing radioactive atoms on other materials. The object is radioactive as long as the contaminant is in contact with it.

Question 8

____________ is the process of exposing an object to nuclear radiation. It does not cause the object to become ____________.

Answer 8

Irradiation is the process of exposing an object to nuclear radiation. It does not cause the object to become radioactive.