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Chem Term 1 Review Flashcards | StudBud
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Chem Term 1 Review
Chem Term 1 Review
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A review of the first term of Chemistry
Flashcards
36 cards
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Practice quiz
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Questions
36
Answers
1
The rule that says electrons in an orbital must have opposite spins is
quantum rule
Aufbau Principle
Pauli Exclusion principle
Hund's Rule
2
How many significant figures are in the following measurement: 0.03460
6
5
3
4
3
A mole of carbon has _______________ as a mole of hydrogen
12 times as many atoms
equal numbers of atoms
more atoms than
less atoms than
4
One cubic centimeter is equivalent to
1 Liter
1 milliliter
10 milliliters
100 centimeters
5
When magnesium and oxygen react to form magnesium oxide, the mass of the compound is
greater than the sum of the masses of the reactants
less than the sum of the masses of the reactants
equal to the sum of the masses of the reactants
There is no relationship
6
Group 18 elements are best known for
for being reactive
for being rare
for being unreactive
their conductivity
7
Which of the following is a physical change?
igniting
release of gas
burning
freezing
8
The molar mass of oxygen gas is
8 g/mol
32.00 g/mol
15.999 g/mol
16.00 g/mol
9
A substance has an EF of CH and molar mass of 78.12g. What is the molecular formula?
C8H8
C3H3
C6H6
C2H2
10
An element with the configuration of [Ar]4s
2
3d
10
4p
4
is in
period 4, group 13
period 3, group 4
period 4, group 16
period 3, group 14
11
Which of the following is a chemical change?
dissolving
magnetism
melting
rusting
12
1 kilogram is equal to
106 grams
1000 grams
10 grams
100 grams
13
A formula that shows the simplest whole-number ratio of the atoms in a compound is the
empirical formula
molecular formula
experimental formula
ideal formula
14
The atomic mass of an element is
average mass of the isotopes
the mass of the least common isotope
the weighted average of the isotopes
the mass of the most common isotope
15
What is the relationship between frequency and wavelength?
Direct relationship
No relationship
Inverse relationship
16
Calculate the following to the correct number of sig figs: (2.86 x 4.6) + 2.628 =
16
15.6
15.7
15.784
17
Elements that are shiny, good conductors, and tend to lose electrons are located
right of the staircase
left of the staircase
18
The hybridization for water is
sp
sp3
sp4
sp2
19
The number of orbitals in a p sub level is
1
5
3
7
20
The speed of light is equal to
number of waves per second
the distance between wave crests
time for one full wave to pass
the product of the frequency and wavelength
21
The atomic radius tends to __________ as you move across a period
increase
decrease
stays the same
doesn't change
22
Elements in the same group have similar
atomic numbers
properties
numbers of neutrons
atomic masses
23
How do you separate components of a mixture?
by using the differences in their chemical properties
By using the differences in their physical properties
24
How many moles are in 42.5 g of NaCl?
1.37506 moles
0.727 moles
0.72724 moles
1.38 moles
25
A combination of 2 or more substances, where each retains its properties is called a
slurry
mixture
element
compound
26
The 3-dimensional space around a nucleus where electrons exist is called a(n)
orbital
electron path
orbi
spectral line
27
To convert 3.45 meters to centimeters, you use the following conversion factor.
1 cm/100 m
1 m/100 cm
10 cm/1 m
100 cm/1 m
28
A sample of gold has a mass of 96.5 g and a volume of 5.00 cm
3
. What is its density?
483 g/cm3
19.3 g/cm3
101.5 g/cm3
0.0518 g/cm3
29
What is the formula for a compound made of magnesium ions and fluoride ions?
Mg2F3
MgF2
MnF2
Mg2F
30
Which of the molecules is non-polar?
H2O
CH4
SO2
NH3
31
The most reactive non-metals are the
alkali metals
lanthanides
noble gases
halogens
32
Name the compound Cu(NO
3
)
2
Copper(II) nitrate
Copper nitrogen oxide
Copper nitrate
Copper dinitrate
33
How many C atoms are in 4.00 moles of C
6
H
12
O
6
?
1.44 x 1025
2.41 x 1024
6
24
34
How many formula units are in 78 g of CaF
2
?
0.998 formula units
6.0 x 1023 formula units
78 formula units
6.01 x 1023 formula units
35
A photon of light at a certain frequent is emitted when electrons move
into the nucleus
from a higher energy level to a lower energy level
to a different orbital in the same energy level
from a lower energy level to a higher energy level
36
Which of the following differs from Dalton's atomic theory?
atoms of different elements combine in whole number ratios
atoms of the same element may have different masses
atoms of the same element are identical
atoms rearrange inchemical reactions
