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25/26 Unit 1: Atoms, Charges, Valence, and Fusion in Stars

Total questions: 63

Worksheet time: 1hrs 29mins

Name
Class
Date
1.

Where is the nucleus found in this picture?

A
B
C
2.

Protons have what charge?

a)

Positive

b)

Neutral

c)

Negative

3.

Neutrons have what charge?

a)

Protons

b)

Neutral

c)

Negative

4.

Electrons have what charge?

a)

Positve

b)

Neutral

c)

Negative

5.

Where do you find protons?

a)

Nucleus

b)

Electrons cloud

c)

Outside the nucleus

6.

Where do you find neutrons?

a)

Nucleus

b)

Electrons cloud

c)

Outside the nucleus

7.

Where do you find electrons? Check all that apply.

a)

Nucleus

b)

Electrons cloud

c)

Outside the nucleus

8.

A proton is found in the ​ (a)   and has a ​ (b)   charge.

Choose from the below words
nucleus
positive
negative
neutral
electron cloud
9.

A electron is found in the ​ ​ (a)   and has a ​ (b)   charge.

Choose from the below words
positive
negative
neutral
electron cloud
nucleus
10.

A neutron is found in the ​ ​ (a)   and has a ​ (b)   charge.

Choose from the below words
positive
negative
neutral
electron cloud
nucleus
11.

Which arrow points to the protons?

A
B
C
12.

Which arrow points to the neutrons?

A
B
C
13.

Which arrow points to the electrons?

A
B
C
14.

Drag the correct response to the appropriate box on the chart.

a)

Same mass as a neutron

b)

Same mass as a proton

c)

much less mass then protons and neutrons

d)

Nucleus

e)

Nucleus

f)

Electron Cloud

g)

Positive

h)

Negative

i)

Neutral/No charge

1
2
3
4
5
6
7
8
9
1)
2)
3)
4)
5)
6)
7)
8)
9)
15.
all matter is made of what 
a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
16.
The positive particles of an atom are 
a)
electrons 
b)
positrons 
c)
neutrons 
d)
protons 
17.
Particles in an atom that are neutral and have no charge are 
a)
negatrons 
b)
electrons 
c)
neutrons 
d)
protons 
18.
The particles that are found in the nucleus of an atom are
a)
neutrons and electrons
b)
electrons only
c)
protons and neutrons
d)
protons and electrons
19.
The central region of an atom where its neutrons and protons are is called the
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
20.
The smallest part of an element is known as the 
a)
Periodic Table
b)
Atom
c)
Group
d)
Period
21.
Something that takes up space and has mass.
a)
volume
b)
matter
c)
mass
d)
density
22.
The amount of space something takes up
a)
density
b)
volume
c)
mass
d)
matter
23.
The amount of matter something contains is its ______________.
a)
gas
b)
solid
c)
weight
d)
mass
24.

Two or more atoms joined together for a(n)...

a)

Element

b)

Compound

c)

Molecule

d)

Mixture

25.
What cannot be broken down into other substances?
a)
Compound
b)
Mixture
c)
Solids
d)
Element
26.
An element is made up of only one kind of _____.
a)
isotope
b)
plastic
c)
atom
d)
metal
27.

The smallest particle into which an element can be divided and still be the same element is a(n)

a)

proton

b)

neutron

c)

electron

d)

atom

28.

What is an atom?

a)

The smallest unit of matter

b)

The smallest unit of measurement

c)

Your next door neighbor

29.

A chemical change is something that can be undone

a)

True

b)

False

30.

Fireworks in an example of

a)

Physical change

b)

Chemical change

31.
Which of these is an example of a new substance being formed?
a)
a nail rusting
b)
a wall being painted
c)
water changing to steam
d)
paper being folded
32.
Which example best describes a physical change?
a)
iron rusting
b)
charcoal burning
c)
an ice cube melting
d)
a marshmallow burning
33.
Glass bottle that is shattered
a)
Chemical Change
b)
Physical Change
34.
The splitting of a nucleus into smaller nuclei is
a)
fusion
b)
fission
c)
half-life
d)
gamma radiation
35.
Takes two small nuclei and combines them into a larger nucleus
a)
fission
b)
fusion
36.
How do nuclear power-plants work?
a)
Fusion
b)
Half-life
c)
Fission
d)
Fusion or fission
37.
This is an example of...
a)
Fission  reaction
b)
Fusion reaction
c)
Decomposition reaction
d)
Decay
38.
Where does fusion occur naturally?
a)
Underwater
b)
All around us
c)
In the radioactive waste
d)
On the sun
39.
Which atoms combine together during fusion reaction on the sun?
a)
Helium and Hydrogen atoms
b)
Hydrogen atoms
c)
Hydrogen and Lithium atoms
d)
Hydrogen and Carbon atoms
40.
An example of an uncontrolled fission reaction is _______________
a)
Nuclear power plants
b)
Radio active decay
c)
Atomic Bomb
d)
On the surface of the sun
41.
Do all stars make energy through fusion?
a)
Yes
b)
No
c)
Just our sun
d)
Only large stars
42.
What is a benefit of nuclear fission?
a)
The ability to absorb energy
b)
The ability to release tremendous amounts of energy
c)
The ability to produce more energy than nuclear fusion
d)
There are no beneficial aspects of nuclear fission
43.
Very high temperature and pressure is required for:
a)
Fission
b)
 Fusion
c)
Radioactive Decay
44.
Requires temperatures of millions of degrees?
a)
Fission
b)
Fusion
45.
Which of the following is true about nuclear fusion?
a)
It is easy to implement.
b)
It produces less energy than nuclear fission.
c)
It produces more energy than nuclear fission.
d)
It has the ability to occur easily in everyday life.
46.

What is the main process that main sequence stars use to produce energy?

a)

Nuclear fission

b)

Hydrogen fusion

c)

Carbon fusion

d)

Helium fusion

47.

What is the color of stars that are more massive and hotter?

a)

Red

b)

Yellow

c)

Green

d)

Blue

48.

What is the next stage in the life cycle of a main sequence star after it leaves the main sequence?

a)

Supernova explosion

b)

Collapse into a white dwarf

c)

Expansion into a red giant

d)

Formation of a black hole

49.

What is the estimated age of the universe?

a)

5 billion years

b)

13.8 billion years

c)

20 million years

d)

10 billion years

50.

This element is the lightest,most abundant in the universe and is the key component of stars

a)

Hydrogen

b)

Helium

c)

Oxygen

d)

Carbon

51.
How many valence electrons are in an atom of Ar?
a)
2
b)
8
c)
4
d)
1
52.
How many valence electrons are in an atom of K?
a)
3
b)
8
c)
4
d)
1
53.
How many valence electrons are in an atom of P?
a)
4
b)
5
c)
2
d)
3
54.
How many valence electrons are found in atoms of group 1?
a)
7
b)
6
c)
4
d)
1
55.
How many valence electrons are found in atoms of group 15?
a)
4
b)
5
c)
2
d)
3
56.
How many valence electrons are found in atoms of Iodine?
a)
4
b)
7
c)
9
d)
1
57.
How many valence electrons are found in atoms of Radium?
a)
2
b)
7
c)
9
d)
1
58.
How many valence electrons are found in atoms of aluminum?
a)
6
b)
3
c)
13
d)
16
59.
How many valence electrons are found in atoms of group 14?
a)
4
b)
3
c)
14
d)
16
60.
Which group has the greatest number of valence electrons?
a)
1
b)
14
c)
18
d)
16
61.

Which subatomic particle has a negative charge?

a)

Electron

b)

Nucleus

c)

Neutron

d)

Proton

62.

Which process splits a large nucleus into smaller nuclei, releasing energy?

a)

Condensation

b)

Fusion

c)

Fission

d)

Evaporation

63.

Which of the following is a chemical change?

a)

Water boiling

b)

Paper burning

c)

Ice melting

d)

Salt dissolving in water

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