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Worksheets19-20 Unit 1 Review
Total questions: 41
Worksheet time: 2hrs 41mins
Name
Class
Date
1.
Which correctly represents an alpha decay?
a)
23990 Th → 42He + 23588Ra
b)
23990 Th → 0-1e + 23991Pa
c)
23990 Th → 42He + 23594Pu
d)
23990 Th → 42He + 23989Ac
2.
Which has the highest penetrating ability?
a)
Beta Particles
b)
Gamma Particles
c)
Alpha Particles
3.
All atoms will have the same
a)
Mass number
b)
Number of Neutrons
c)
Atomic Number
d)
All of the Above
4.
How many protons are in the nucleus of an atom of Bromine-80?
a)
35
b)
36
c)
80
d)
45
5.
How many particles are in 3.2 moles of Potassium Hydroxide (KOH)?
a)
1.9 x 1023 particles
b)
1.8 x 1023 particles
c)
5.3 x 10-24 particles
d)
1.9 x 1024 particles
6.
An atom is electrically neutral when the number of protons and electrons_________ equal.
a)
are
b)
are not
7.
How many moles of (Au) gold are there in 1.8 x 1020 atoms of gold?
a)
3.0 x 10-4 mol
b)
1.1 x 1044 mol
c)
3.3 x 103 mol
d)
3.0 x 1042 mol
8.
A subatomic particle that has NO electrical charge is
a)
nuclide
b)
neutron
c)
isotope
d)
electron
9.
Chlorine-35 and Chlorine-37 are
a)
Isotopes
b)
Compounds
c)
different atoms
d)
nuclei
10.
Wavelength and frequency always have an inverse relationship. Therefore, wave frequency increase, wavelength _________ and when frequency decreases, wavelength ____________.
a)
increase, increase
b)
decrease, increase
c)
decrease, decrease
d)
increase, decrease
11.
__________ combines to form a larger one, and ___________is nucleus split by neutrons.
a)
fission, fusion
b)
fusion, fission
12.
When a nuclear reaction takes place, unstable nuclei will give _______amounts of energy and become _______stable.
a)
large, more
b)
small, less
c)
large, less
d)
small, more
13.
Balance the following equation:
14761Pm → ______ + 0-1e
14761Pm → ______ + 0-1e
a)
14758 Ce
b)
14762Sm
c)
14760Nd
d)
14862 Sm
14.
_____ have the longest wavelengths and lowest frequencies of all electromagnetic waves.
a)
microwaves
b)
radio waves
c)
gamma rays
d)
ultraviolet
15.
High frequency waves have _________ wavelengths.
a)
varying
b)
long
c)
the same
d)
short
16.
Which is the correct order of waves of the electromagnetic spectrum, from lowest energy to highest energy?
a)
radio waves, microwaves, infrared waves, visible light, ultraviolet light, x-rays, gamma rays
b)
gamma rays, x-rays, ultraviolet light, visible light, infrared light, microwaves, radio waves
c)
radio waves, gamma rays, x-rays, visible light, microwaves, ultraviolet light, infrared waves
17.
The blue section of the wave is measuring _________________.
a)
wavelength
b)
crest
c)
trough
d)
amplitude
18.
The orange line is measuring the _________________________.
a)
wavelength
b)
amplitude
c)
crest
d)
trough
19.
What is the correct order of the visible light spectrum from longest wavelength to shortest wavelength?
a)
ROYGBIV
b)
ROGYVIB
c)
VIBGYOB
d)
BIVGOYR
20.
The number 6.02 x 1023, which is the number of particles found in a mole.
a)
molar mass
b)
mole
c)
Avogadro's number
d)
hydrate
21.
How many molecules are in 9.44 moles of AlCl3?
a)
5.68 molec AlCl3
b)
5.68x1024 molec AlCl3
c)
0.705 molec AlCl3
d)
1.25x1023 molec AlCl3
22.
How many molecules are in 2.5 mol of NaCl?
a)
1.51x1023
b)
146
c)
4.15
d)
1.51x1024
23.
How many atoms are in 6.3 mol Zn?
a)
6.0x1023atoms Zn
b)
3.8x1024atoms Zn
c)
1.0x10-23atoms Zn
d)
410atoms Zn
24.
How many moles of methane (CH4) are in 1.24 x 1023 molecules of methane?
a)
6.02 x 1023
b)
7.46 x 1046
c)
978
d)
0.206
25.
In the symbol 167N what the 7 stand for?
a)
Mass number
b)
Atomic number
c)
Atomic mass
d)
Number of neutrons
26.
Balance the following equation:
146C --> 0-1e + ________
146C --> 0-1e + ________
a)
145B
b)
146C
c)
147N
d)
42He
27.
What is the missing isotope that will balance the following nuclear equation?
94Be + 11H → _____ + 42He
94Be + 11H → _____ + 42He
a)
105B
b)
105Ne
c)
63Li
d)
63C
28.
Gamma rays have a _____ charge
a)
0
b)
+1
c)
-1
d)
+2
29.
Beta particles have a _____ charge
a)
+1
b)
0
c)
-1
d)
+2
30.
How would you write 0.0005 in scientific notation?
a)
50 x 105
b)
5 x 10-4
c)
5 x 10-3
d)
.5 x 103
31.
How do you write
8.317 x 106
in standard form?
8.317 x 106
in standard form?
a)
8, 371, 000
b)
83, 170, 000
c)
837, 100
d)
8, 317, 000
32.
How many significant digits are there in "0.94"?
a)
1
b)
2
c)
3
d)
none
33.
How many significant digits are there in "0.0805"?
a)
2
b)
3
c)
4
d)
5
34.
Round "3.14159" to three significant digits.
a)
3.14
b)
3.15
c)
3.142
d)
3.1416
35.
Round "0.265" to two significant digits.
a)
0.3
b)
0.27
c)
0.25
d)
0.2
36.
There are __?__ significant digits in the number 23.012.
a)
1
b)
2
c)
4
d)
5
37.
There are __?__ significant digits in the number 0.00076
a)
2
b)
4
c)
5
d)
6
38.
Why is the zero significant in the digit 706?
a)
It is an ending zero after the decimal point.
b)
It is a beginning zero.
c)
It is between 2 significant digits.
d)
It is not a significant digit.
39.
Which is correct regarding the significant digits for the number 0.0054?
a)
The zeroes are not significant digits since they are beginning zeroes.
b)
The zeroes are not significant digits since they are ending zeroes.
c)
They are significant since they are between significant digits.
d)
All zeroes are not significant digits.
40.
Which of the following is the answer for the problem with the correct number of significant digits?
53.0 + 23.41 = 76.41
a)
77.0
b)
77
c)
76.4
d)
76
41.
Which of the following is correct scientific notation?
a)
20.35 x 104
b)
.2035 x 104
c)
2035 4
d)
2.035 x104
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