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WorksheetsInner Space revision 2020
Total questions: 30
Worksheet time: 17mins
Name
Class
Date
1.
All elements are composed of
a)
molecules
b)
atoms
c)
neutrons
d)
compounds
2.
Atoms of the same element must always have the same number of _________
a)
electrons
b)
neutrons
c)
isotopes
d)
protons
3.
The dense, positively charged mass located in the center of the atom.
a)
nucleus
b)
proton
c)
isotope
d)
molecule
4.
The __________ of an atom is the sum of the protons and neutrons in the nucleus of that atom.
a)
mass number
b)
atomic number
c)
atomic weuight
d)
isotope weight
5.
Number of protons in an atom of an element.
a)
proton count
b)
atomic number
c)
atomic mass
d)
isotopes
6.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
7.
Which particle is negatively charged?
a)
proton
b)
atom
c)
neutron
d)
electron
8.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
9.
How many electrons would an atom of Krypton have?
a)
83.80
b)
36
c)
12
d)
none
10.
Which is an electron?
a)
A
b)
B
c)
C
11.
Where are protons located in an atom?
a)
nucleus
b)
electron cloud
c)
neutron
d)
who knows?
12.
Where are neutrons located within an atom?
a)
nucleus
b)
electron cloud
c)
neutron
d)
who knows?
13.
Which of these is the proton.
a)
A
b)
B
c)
C
d)
None
14.
Most of the mass in an atom is made up of _____________________?
a)
protons and electrons
b)
protons and neutrons
c)
neutrons and electrons
d)
electrons and quarks
15.
What is radioactivity?
a)
The positively charged central core of an atom.
b)
When a nucleus decays and it emits some particles/waves from the nucleus.
c)
When a change occurs in the nucleus to make it more stable.
d)
An opposing force caused by the interaction between two surfaces.
16.
What are the three types of radioactivity?
a)
Sedimentary, Metamorphic, Igneous.
b)
Alpha, Beta, Gamma.
c)
Cardiac, Smooth, Skeletal.
d)
Verbal, Situational, Dramatic.
17.
Which of the following typically poses the biggest health threat to humans ?
a)
Alpha particles
b)
Beta particles
c)
Gamma rays
d)
All of the above
18.
The process by which nuclei having small masses are united to form a single larger nucleus is called nuclear ____.
a)
fusion
b)
fission
c)
reactivity
d)
waste
19.
Name the instrument used to detect radioactivity.
a)
voltmeter
b)
ohmeter
c)
seismograph
d)
geiger counter
20.
Neutrons released in a fission reaction can strike other nuclei and cause a
a)
meltdown
b)
take down
c)
break down
d)
chain reaction
21.
Each element with an atomic number greater than 83 is ____.
a)
stable
b)
synthetic
c)
lighter than air
d)
radioactive
22.
Energy in the sun is produced as a result of nuclear ____ reactions.
a)
fusion
b)
fission
c)
waste
d)
sub
23.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
24.
What element is this an atom of?
a)
nitrogen
b)
lithium
c)
beryllium
d)
carbon
25.
What atom is represented here?
a)
Carbon
b)
Nitrogen
c)
Oxygen
d)
Fluorine
26.
How many valence electrons are represented here?
a)
7
b)
5
c)
2
d)
8
27.
Which of the following is the correct Lewis structure for chlorine?
a)
A
b)
B
c)
C
d)
D
28.
How many electrons should Lithium have around its Lewis dot model?
a)
1
b)
2
c)
3
d)
4
29.
How many electrons should Hydrogen have around its Lewis dot model?
a)
1
b)
2
c)
7
d)
8
30.
How many electrons should Nitrogen have around its Lewis dot model?
a)
1
b)
3
c)
4
d)
5
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