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Chemistry Chapter 3 & 4 Review Flashcards | StudBud
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Chemistry Chapter 3 & 4 Review
Chemistry Chapter 3 & 4 Review
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#Chemistry
Flashcards
24 cards
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Questions
24
Answers
1
What is the mass number of an atom with 20 protons and 22 neutrons?
20
22
440
42
2
Atoms of elements
always
have
More electrons than protons
More protons than electrons
Equal # of protons and electrons
Equal # of protons and neutrons
3
Who used the gold foil experiment to demonstrate the existence of an atomic nucleus?
Niels Bohr
JJ Thompson
Ernest Rutherford
Robert Millikan
4
What are atoms called if they have the same # of protons, but different # of neutrons?
isotopes
isospheres
proteons
fermeons
5
Carbon-13 (atomic number 6) has _____ neutrons
5
It can not be determined
7
6
6
What is -273
o
C in Kelvin?
546 K
0 K
-546 K
-273 K
7
What is defined as 1/12th a carbon-12 atom?
an amu
a carbonium
a fermeon
one electron's mass
8
What is the SI unit for energy?
gram
Joule
liter
second
9
How many significant figures does 77.70 have?
2
1
4
3
10
What is 3.0x10
4
written in standard notation?
300
0.00003
0.0003
30000
11
How many grams are in 1 kg?
10
1000
100
1
12
What is 0.0021 in scientific notation
2.1 x 103
2.1x10-3
2.1x10-2
2.1x102
13
What is the sum of 10.0 + 15 to the correct number of significant figures?
25.00
25.0
30
25
14
How many nanometers are in 1 meter?
0.1
100
1000
109
15
What is the SI unit for time?
gram
Joule
second
liter
16
What is the product of 2.00 x 6.000 to the correct number of significant figures?
12
12.000
12.0
10
17
How many significant figures are in 0.0021
2
3
4
1
18
What is the density of sulfur that has a mass of 23.5 g and a volume of 11.4 cm
3
?
0.485 g/cm3
270 g/cm3
2.06 g/cm3
268 g/cm3
19
Who used a cathode ray to determine the existence of an electron?
Niels Bohr
JJ Thompson
Ernest Rutherford
Robert Millikan
20
Which conversion factor would be used to change 20 mm to m?
1000 mm / 1 m
1 m / 1000 mm
21
Which is part of Dalton's atomic theory?
Elements are made of indivisible units called atoms.
Atoms can come together in fixed whole number ratios to form
All of the above
All atoms of the same element are identical.
22
Accuracy is
The difference between the accepted and actual value
How close a series of measurements are to one another
How close a measurement comes to the true value
(error÷accepted) value x 100
23
Corn syrup has a larger density than water. Corn syrup will
sink when poured in water
float when poured in water
24
Which is a unit of volume?
mL
All of the above
liter
cm3
