Free Printable Atomic Physics

1.

a)

A

b)

B

c)

C

d)

D

2.

a)

A

b)

B

c)

C

d)

D

3.

a)

A

b)

B

c)

C

d)

D

4.

a)

A

b)

B

c)

C

d)

D

5.

a)

A

b)

B

c)

C

d)

D

6.

a)

A

b)

B

c)

C

d)

D

7.

a)

A

b)

B

c)

C

d)

D

8.

a)

A

b)

B

c)

C

d)

D

9.

a)

A

b)

B

c)

C

d)

D

10.

a)

A

b)

B

c)

C

d)

D

11.

What are the 3 sub-atomic particles called?

a)

potions, neutrons and electrons

b)

protons, neurons and electrons

c)

protons, neutrons and elections

d)

protons, neutrons and electrons

12.

What is the mass number?

a)

Number of protons plus neutrons

b)

Number of protons plus electrons

c)

Number of neutrons plus electrons

13.

What is the atomic number?

a)

Number of protons plus electrons

b)

Number of protons

c)

Number of protons plus neutrons

d)

Number of protons, neutrons and electrons

14.

Where are the protons and neutrons found?

a)

In isotopes

b)

In ions

c)

In the nucleus

d)

In shells

15.

An atom is neutral if...

a)

The number of protons = electrons

b)

The number of neutrons = protons

c)

The number of protons∠ electrons

d)

Electrons+Neutrons = 0

16.

Two atoms of the same element but with different mass numbers are called________

a)

electrons

b)

isotopes

c)

variables

d)

electron cloud

17.

The scattering of α-particles by a thin metal foil supports the nuclear model of an atom.

Why are α-particles used rather than neutrons?

a)

because they always travel more slowly

b)

because they are heavier

c)

because they are larger in diameter

d)

because they have a positive charge

18.

A nucleus of a radioactive substance $_{84}^{218}Po\$ undergoes an α-decay followed by a β-decay.
What are the nucleon (mass) number (A) and proton (atomic) number (Z) of the nuclide formed after both decays have happened?

a)

A=214, Z=85

b)

A=216, Z=85

c)

A=214, Z=83

d)

A=216, Z=83

19.

Fig. 12.1 shows a decay curve for polonium-210.

Use the graph to determine the half-life of polonium-210.

half-life = (a) weeks

20.

The half-life of carbon-14 is 5800 years.

A piece of wood contained 20 000 carbon-14 atoms when it was buried in a landslide.

Calculate the number of years it takes until the number of carbon-14 atoms in the wood is 2500.

(a)

21.

(a) Fig. 12.1 represents an atom of carbon.
(i) State the name of particle X.
(ii) State the name of particle Y.
(b) Carbon-14 is unstable. It decays by beta emission to form nitrogen.
Complete the equation for this decay. $_6^{14}C\ \ \rightarrow\ _Z^AN\ \ +_{-1}^0e\$

A= ...

Z= ...

4 lines

22.

Sodium-24 decays to magnesium-24 according to the following equation. $_{11}^{24}\ Na\ \ →\ \ _{12}^{24}\ Mg\ +\ emitted\ particle$
What is the emitted particle?

a)

α-particle

b)

β-particle

c)

neutron

d)

proton

23.

Which diagram represents an experiment that provided evidence for the nuclear atom?

a)

b)

c)

d)

24.

Radioactive source S emits α-particles, β-particles and γ-rays. A detector is placed 5 cm away from S. A thin sheet of paper is placed as shown in the diagram.

Which emissions from the source can be detected?

a)

α-particles and β-particles only

b)

α-particles and γ-rays only

c)

β-particles and γ-rays only

d)

α-particles, β-particles and γ-rays

25.

What makes something radioactive?

a)

an unstable nucleus

b)

contaminated sewage

c)

elements with an atomic number above 81

d)

it decays over time

26.

______________ is a process by which unstable atoms emit radiation until they become stable.

a)

Radiation

b)

Chemical Reaction

c)

Radioactive Decay

d)

Isotopes

27.

Ernest Rutherford discovered that atoms were mostly _________________.

a)

negatively charged

b)

positively charged

c)

electrons

d)

empty space.

28.

Name the most penetrating type of radiation.

a)

alpha

b)

beta

c)

gamma

d)

lambda

Atomic Physics

Total questions: 28

Worksheet time: 29mins

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