Basic Chemistry Video Pack
Basic Chemistry Video Pack

Basic Chemistry Video Pack

Student Price: Free with Top Hat Pro Subscription

An interactive video pack featuring videos from Teacher's Pet.

Radiation and Radioactivity - Video



Question 1

Match the term to its definition.

Premise
Response
1

Radiation

A

the penetrating ray and particles emitted by a radioactive source.

2

Alpha particle

B

A positron is a particle with the mass of an electron but a positive charge. During positron emission a proton changes to a neutron.

3

Beta particle

C

an electron resulting from the breaking apart of neutrons in an atom

4

Gamma ray

D

the time spent required for one-half of the nuclei of a radioisotope sample to decay into products.

5

Nuclear stability

E

a technique used to date materials such as rock or carbon - usually based on a comparison between the observed abundance of a radioactive isotope and its decay products using known decay rates.

6

Electron capture

F

a high-energy photon emitted by a radioisotope

7

Positron emission

G

a positively charged particle identical to a helium nucleus (two protons and two neutrons)

8

Half life

H

the number of neutrons (the neutron to proton ratio)

9

Radiometric dating

I

An electron in an atom's inner shell is drawn into the nucleus where it combines with a proton forming a neutron and a neutrino. the neutrino is ejected from the atom's nucleus.


Question 2

Carbon-14 has a half life of 5,730 years. When a wooly mammoth died, it contained 3.13 x 1010^{-10} g of carbon-14. If 4 half lives have passed, how much carbon-14 will remain?

A

1.96 x 1011^{-11}

B

1.25 x 109^{-9}

C

1.96 x 1011^{11}

D

1.57 x 1010^{-10}

E

1.25 x 1010^{-10}