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WorksheetsAtomic Structure quiz
Total questions: 30
Worksheet time: 23mins
Name
Class
Date
1.
What is an atomic number?
a)
The number of protons in an element
b)
The number of neutrons in an element
c)
The number of protons and neutrons.
d)
The number of protons and electrons.
2.
What is the atomic number of an element with 12 protons, 13 neutrons and 12 electrons?
a)
12
b)
13
c)
25
d)
24
3.
Changing the number of electrons in an atom results in the formation of :
a)
positive ion only
b)
positive ion or negative ion
c)
negative ion only
d)
new atom
4.
Changing the number of neutrons in an atom results in the formation of a(an) _______
a)
atom
b)
isotope
c)
anion ( a negative ion)
d)
cation (a positive ion)
5.
How many protons are in an atom of carbon?
a)
12.01
b)
8
c)
6
d)
14
6.
How many electrons does a neutral carbon atom have?
a)
0
b)
2
c)
14
d)
6
7.
When there are the same number of protons and electrons in an atom, that atom is a...
a)
positive ion.
b)
negative ion.
c)
unstable isotope.
d)
neutral atom.
8.
Examine the label of the atom. Which is an electron?
a)
A
b)
B
c)
C
9.
Examine the label of the atom. Which is a proton?
a)
A
b)
B
c)
C
10.
An element can be defined by the number of ___________ in the nucleus of its atoms.
a)
protons
b)
neutrons
c)
electrons
d)
atoms
11.
Electrons are located outside the nucleus of an atom.
a)
True
b)
False
12.
What is the atomic number of an element with 12 protons, 13 neutrons and 12 electrons?
a)
12
b)
13
c)
25
d)
24
13.
Changing the number of neutrons in an atom results in the formation of a(an) _______
a)
atom
b)
isotope
c)
anion ( a negative ion)
d)
cation (a positive ion)
14.
How many protons are in an atom of carbon?
a)
12.01
b)
8
c)
6
d)
14
15.
How many electrons does a neutral carbon atom have?
a)
0
b)
2
c)
14
d)
6
16.
Examine the label of the atom. Which is an electron?
a)
A
b)
B
c)
C
17.
Examine the label of the atom. Which is a proton?
a)
A
b)
B
c)
C
18.
Examine the label of the atom. Which is a neutron?
a)
A
b)
B
c)
C
19.
The combined mass of protons and neutrons are called_______.
a)
mass number
b)
weight number
c)
atomic number
d)
isotope number
20.
What is the name of the positively charged particle found in the center of the atom?
a)
proton
b)
electron
c)
neutron
21.
Isotopes are atoms of the same element that have the same number of __________ but different number of __________ . Therefore, isotopes of the same element have different masses.
a)
protons, neutrons
b)
protons, electrons
c)
neutrons, protons
d)
electrons, protons
22.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
23.
An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.
a)
20
b)
10
c)
5
d)
25
24.
What is the atomic number of the element shown?
a)
19
b)
39
c)
20
25.
How many neutrons are contained in a neutral atom of:
a)
7
b)
14
c)
8
d)
9
26.
The atomic mass of an atom equals _ + _
a)
protons + neutrons
b)
protons + electrons
c)
neutrons + electrons
d)
nucleus + electron cloud
27.
Valence electrons are:
a)
Electrons farthest away from the nucleus
b)
Electrons closest to the nucleus
c)
Electrons that just come and go - they don't stay with the atom
28.
An element is:
a)
a substance that cannot be broken down into any other substance
b)
found on the periodic table
c)
made up of atoms
d)
All answers are correct
29.
How many neutrons are in the element shown if its mass number is 39?
a)
19
b)
39
c)
20
30.
How many valence electrons does a neutral atom of the element shown have?
a)
19
b)
39
c)
20
d)
2
e)
1
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