Worksheetsstructure of atoms
Total questions: 15
Worksheet time: 9mins
Name
Class
Date
1.
What number indicates the nucleus?
a)
1
b)
2
c)
3
d)
4
2.
The particles with no charge in an atom are the _______.
a)
electrons
b)
neutrons
c)
protons
d)
protons and neutrons
3.
a)
Nucleus, positive
b)
Nucleus, negative
c)
Nucleus, neutral
d)
Electron Cloud, positive
4.
What is the atomic number of chlorine?
a)
35
b)
18
c)
7
d)
17
5.
How many protons are there in an atom of aluminium?
a)
27
b)
13
c)
14
d)
17
6.
What is the symbol of manganese?
a)
Mg
b)
M
c)
Ma
d)
Mn
7.
What are valence electrons?
a)
electrons on the first orbital always
b)
nucleus
c)
the outermost shell
d)
the number of electrons on the outermost orbital
8.
Oxygen’s atomic number is 8. This means that an oxygen atom must have
a)
8 electrons
b)
8 protons
c)
8 neutrons
d)
a mass number of 8
9.
Electrons are subatomic particles that exist
a)
inside the nucleus.
b)
in simultaneous dimensions.
c)
in parallel universes.
d)
outside the nucleus.
10.
Neutrons have almost exactly the same mass as
a)
electrons.
b)
positrons.
c)
protons.
d)
quarks.
11.
James Dalton proved that the true nature of the atom could best be described as resembling "plum pudding."
a)
True
b)
False
12.
What is the atomic number of the atom pictured?
a)
11
b)
12
c)
22
d)
23
13.
What is the mass number of this element?
a)
5
b)
27
c)
32
d)
59
14.
The central region of an atom where its neutrons and protons are is its
a)
nucleus
b)
core
c)
electron cloud
d)
centre
15.
What does the nucleus of an atom contain?
a)
Electrons and neutrons
b)
Protons and neutrons
c)
Electrons and protons
d)
Neutrons and electrons
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