WorksheetsUnderstanding The Atom
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
Protons are...
a)
Positively Charged
b)
Negatively Charged
c)
Neutral
d)
Orbit Around The Nucleus
2.
Electrons...
a)
Orbit around the nucleus and are positively charged
b)
Negatively charged
c)
Orbit around the nucleus
d)
Both B and C
3.
The nucleus...
a)
Orbits the proton
b)
Is made up of protons and neutrons
c)
Surround the atom
d)
None of the above
4.
The atomic number...
a)
Tells what can and can't be moved in the atom
b)
The number of protons in the nucleus of the atom
c)
Tells the number of electrons in the nucleus
d)
All of the above
5.
The atomic mass...
a)
Is equivalent to the number of protons and neutrons in the nucleus
b)
Is the amount of electrons in the electron cloud
c)
Is how many valence electrons are located in the atom
d)
Both A and B
6.
If Lithium has an atomic number of 3 and an atomic weight of 7, the correct number of protons, neutrons, and electrons (in that order) is...
a)
3, 4, 3
b)
4, 3, 3
c)
3, 3, 4
d)
3, 4, 4
7.
An isotope...
a)
Is the same element with the same number of neutrons with a different number of protons
b)
Is the same element with the same number of protons with a different amount of electrons
c)
Is the same element with same amount of protons with a different amount of neutrons
d)
None of the above
8.
Which of the following are isotopes?
a)
Carbon 14
b)
Uranium 238
c)
Potassium 40
d)
All of the above
9.
If Sodium (Na) were to gain a proton, what would it be?
a)
Na +1
b)
Na 12
c)
Mg
d)
None of the Above
10.
When atoms share electrons, it is called...
a)
Chemical Bond
b)
Covalent Bond
c)
A and B
d)
None of the above
11.
What is the mass number of an element that has 19 protons, 19 electrons, and 20 neutrons?
a)
19
b)
20
c)
39
d)
58
12.
How many electrons are in the isotope Fe -53 if there are 26 protons
a)
53
b)
30
c)
26
d)
27
13.
How many protons are in the isotope Sulfur-25 if there are 9 neutrons?
a)
7
b)
16
c)
9
d)
25
14.
How many neutrons are in the isotope Nitrogen-20 if there are 7 protons?
a)
13
b)
8
c)
7
d)
20
15.
Chromium-63 has 39 neutrons, so how many protons does it have?
a)
63
b)
24
c)
34
d)
39
16.
Isotopes of the same element must have the same number of...
a)
Neutrons
b)
Protons
c)
Electrons
d)
Both A and C
17.
Isotopes of the same element must have a different number of...
a)
Protons
b)
Electrons
c)
Neutrons
d)
Both A and B
18.
Which isotopes of Baron (10B+ or 11B+) would travel furthest in am ass spectrometer?
a)
10B+
b)
11B+
c)
12B+
d)
They would travel the same
19.
What is the mass numebr of Postassium-37?
a)
19
b)
18
c)
24
d)
37
20.
What is the mass number for Uranium-235?
a)
235
b)
92
c)
94
d)
146
21.
What is the mass number for Boron-11?
a)
11
b)
15
c)
26
d)
5
22.
What is the average atomic mass?
a)
The mass of the atoms of an element, based on the abundance of its isotopes in nature
b)
The symbol of the element
23.
What is the mass number of Oxygen-17?
a)
8
b)
17
c)
9
d)
10
24.
What is the mass number of Boron-10?
a)
12
b)
15
c)
5
d)
10
25.
What is the mass number of Uranium-238?
a)
15
b)
237
c)
238
d)
239
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