The Atom: Radioactivity

Question 1

Radioactive

Answer 1

Atoms that decay and produce radioactive matter

Question 2

Types of radiation

Answer 2

Alpha, gamma and beta

Question 3

Geiger counter

Answer 3

Measure the radioactivity

Question 4

Radionuclide

Answer 4

Radioactive isotope

Question 5

Carbon dating

Answer 5

Measuring the decay of carbon-14 to tell the age of objects

Question 6

When does alpha radiation usually occur?

Answer 6

Alpha radiation usually occurs when the atom is unstable because they are too big

Question 7

Alpha radiation

Answer 7

Radiation that releases 2 protons and 2 neutrons

Question 8

When does beta radiation usually occur?

Answer 8

Bet radiation usually occurs when the atom is unstable because the ratio of neutron and proton is unequal

Question 9

Beta radiation

Answer 9

Radiation that breaks a neutron into an electron and proton and ejects the electron

Question 10

When does gamma rays usually occur?

Answer 10

Gamma rays usually occurs after radiation and when the atom is still excited

Question 11

Charge of alpha particples

Answer 11

+(2)

Question 12

Charge of beta particples

Answer 12

-(1)

Question 13

Charge of gamma rays

Answer 13

0

Question 14

Penetration of alpha particples relative to the others

Answer 14

Weak

Question 15

Penetration of beta particples relative to the others

Answer 15

Average

Question 16

Penetration of gamma rays relative to the others

Answer 16

Strong

Question 17

Radiative half-life

Answer 17

The time necessary for a radioactive material to decay half-way

Question 18

Radiation therapy

Answer 18

The use of radiation therapy to treat disease

Question 19

Brachytherapy

Answer 19

Radiation therapy inside the body