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Radioactive Elements

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

The release of particles and energy from an unstable nucleus

a)

Isotopes

b)

Radioactivity

c)

X rays

d)

Electromagnetic energy

2.

Who discovered the radioactivity?

a)

Marie Curie

b)

Pierre Curie

c)

Henri Becquerel

d)

All of them

3.

What are the two elements discovered by Marie Curie?

a)

Po and Fr

b)

U and Pu

c)

Po and Ra

d)

Ra and FR

4.

What isotope is measured in the radioactive dating?

a)

Carbon 12

b)

Carbon 14

c)

Carbon 15

d)

Carbon 16

5.

Use of the radioactive elements in medicine

a)

Chemotherapy

b)

Radiotherapy

c)

Radioactive dating

d)

Nuclear energy

6.

Which machine is not using nuclear energy

a)

Submarine

b)

Satellite

c)

Nuclear plant

d)

Car

7.

Nuclear disaster in 1986 produced by a human mistake

a)

Chernobyl

b)

Fukushima

8.

Nuclear disaster in 2011 produced by an earthquake and a tsunami

a)

Chernobyl

b)

Fukushima

9.

This decay is composed of two protons and two neutrons

a)

Alpha

b)

Beta

c)

Gamma

10.

This decay is only energy with the highest frequency

a)

Alpha

b)

Beta

c)

Gamma

11.

In this decay one neutron changes to a proton and a free electron

a)

Alpha

b)

Beta

c)

Gamma

12.

The time needed to decay the half of the sample

a)

Whole life time

b)

Half life time

c)

Half life decay

d)

Whole life decay

13.

This type of decay can be stopped with metals and plastics

a)

Alpha

b)

Beta

c)

Gamma

14.

This type of decay can be stopped with concrete and lead

a)

Alpha

b)

Beta

c)

Gamma

15.

This type of decay can be stopped with paper or human body

a)

Alpha

b)

Beta

c)

Gamma

16.

Nuclear reaction that separe the nucleus in smaller ones and free particles

a)

Nuclear Fussion

b)

Nuclear Fission

17.

Nuclear reaction that join two nucleus and produce a bigger one and free particles

a)

Nuclear Fission

b)

Nuclear Fussion

18.

Marie Curie won her first Nobel in.....

a)

Physics

b)

Chemistry

c)

Medicine

d)

Literature

19.

Marie Curie won her second Nobel in.....

a)

Physics

b)

Chemistry

c)

Math

d)

medicine

20.

Who was the leader of the Manhattan Project?

a)

Albert Einstein

b)

Robert Oppenheimer

c)

Werner Heisenberg

d)

Erwin Schrödinger