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WorksheetsUnit 1 Exam A is for Atoms
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
In terms of the sequence of the scientific method, what is the immediate purpose of doing an experiment?
a)
drawing conclusions
b)
gathering data
c)
asking the question
d)
answering your claim
2.
Who discovered the electron?
a)
Cassandra Bouakka
b)
Neil Bohr
c)
John Dalton
d)
J.J. Thomson
3.
The mass number of an atom is equal to which of the following?
a)
the number of electrons circling the nucleus of an atom
b)
the number of protons in a nucleus
c)
the number of protons plus the number of neutrons in a nucleus
d)
the number of protons plus the number of electrons in an atom
4.
Nitrogen (N2) is made up of 99.632% 14N and 0.368% 15N. The atomic mass of 14N is 14.003 amu. The atomic mass of 15N is 15.000 amu. What is the average atomic mass of nitrogen?
a)
14.007 amu
b)
15.00 amu
c)
155.00 amu
d)
1.40 amu
5.
What is the maximum number of electrons that can occupy a box in an orbital filling diagram at any energy level?
a)
2
b)
8
c)
18
d)
32
6.
A material weighs 8 grams and takes up 2 cubic centimeters of space. What is the material's density in grams per cubic centimeter (g/cm3)?
a)
10 g/cm 3
b)
4 g/cm 3
c)
2 g/cm 3
d)
6 g/cm 3
7.
A balloon is a sphere with a radius of 5.0 m. The force of air against the walls of the balloon is 45 N. What is the air pressure inside the balloon? (surface area = 12.56 x radius 2; 1 Pa = 1 N/m 2)
a)
1.4 x 10–1 Pa
b)
3.6 x 10 2 Pa
c)
3.6 x 10–2 Pa
d)
1.4 x 10 3 Pa
8.
The independent variable goes on the x-axis and the dependent variable goes on the y-axis.
a)
True
b)
False
9.
Which of the following is in the same period as Cl?
a)
Sn
b)
I
c)
P
d)
Hg
10.
The first ionization energy decreases from top to bottom within a group.
a)
True
b)
False
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