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Chemistry Post-Benchmark Review (Day 1) Flashcards | StudBud
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Chemistry Post-Benchmark Review (Day 1)
Chemistry Post-Benchmark Review (Day 1)
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Chemistry Post-Benchmark Review (part 1) #post #benchmark # chem #chemistry
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Answers
1
Which of the following statements about absolute zero (0 K) is true?
It is the zero point on Celsius
It is the temp where motion ceases
It is the freezing point
It is equal to - 256 K
2
How many valence electrons would any element (except He) in Group 18 have?
8
6
5
7
3
How many valence electrons would any element in Group 14 have?
2
1
4
3
4
What is the "amount of product that forms when a reaction is carried out in an experiment?"
total amount
actual yield
reactants
theoretical yield
5
What type of element is Bromine (Br)?
noble gas
alkali metals
alkaline earth
halogen
6
What type of bond is formed between the atoms of this molecule?
ionic
metallic
covalent
crystalline
7
How many valence electrons would any element in Group 13 have?
3
2
4
1
8
Carbon is capable of forming _____ covalent bonds
eight
four
two
three
9
How many valence electrons would any element in Group 16 have?
6
5
7
8
10
Carbon atoms are capable of forming a very limited amount of structures / compounds
TRUE
FALSE
11
What type of bond is formed between atoms of Li and F?
ionic
metallic
polar covalent
covalent
12
Which of the following elements is most reactive?
Helium
Fluorine
Uranium
Francium
13
If water freezes at 0°C, what does it freeze at in Kelvin?
32 K
305 K
273 K
- 273 K
14
How many valence electrons do elements in Group 2 have?
3
2
4
1
15
The atomic number is always equal to the number of ______ in an atom
neutrons
protons and <br>neutrons
protons
electrons
16
Chloride (Cl-) has a _____ than the sodium cation (Na+)
larger ionic size
lower nuclear charge
larger atomic radius
lower ionization energy
17
Which group of hydrocarbons contain at least one triple bond?
alkenes
alkyls
alkynes
alkanes
18
A double bond consists of
two electrons
the valence electrons of 4 elements
a shared pair of electrons
two shared pairs of electrons
19
How many valence electrons would any element in Group 1 have?
4
2
1
3
20
Which prefix means the compound has 3 carbons?
pent-
eth-
hept-
pro-
21
What is the mass of one mole of Carbon-13?
13 grams
6.022 x 10 23 grams
6 grams
12 grams
22
Which prefix means the compound has 5 carbons?
eth-
pent-
pro-
hept-
23
Which of the following is the correct balanced equation for carbon + oxygen --> carbon monoxide
C + O2 --> CO2
2C + 2O2 --> 2 CO2
C2 + 2O2 --> 2 CO2
2C + O2 --> 2 CO
24
What is the noble gas config of the element directly below [He] 2s
2
2p
3
?
[Ne] 3s2 3p3
[Ne] 3s2 3p4
[He] 2s2 2p4
[He] 2s2 2p2
25
Which prefix means the compound has 7 carbons?
pent-
eth-
pro-
hept-
26
Of these elements, which has the smallest mass number? Bromine, Barium, Nickel, Arsenic
Arsenic (As)
Bromine (Br)
Nickel (Ni)
Barium (Ba)
27
The equation used to calculate percent yield is:
( experimental / actual ) x 100
( theoretical / actual ) x 100
( theoretical / calculated ) x 100
( actual / theoretical ) x 100
28
If the temperature is 247 °C, what is the temperature in Kelvin?
- 26 K
520 K
484 K
26 K
29
What is the name for elements in Groups 3-12?
transition metals
alkaline earth
actinides and lanthanides
alkali metals
30
What is the name for elements in the f block?
actinides and lanthanides
transition metals
alkaline earth
alkali metals
31
The particles of Li and F are most likely
positively charged ions
oppositely charged ions
negatively charged ions
neutrally charged ions
32
Which functional group has the formula R-OH?
ethers
alcohols
amines
aldehydes
33
Organic chemistry is about compounds that have high concentrations of the element:
oxygen
carbon
nitrogen
hydrogen
34
What is the name for the Group 2 elements?
alkaline earth
transition metals
alkali metals
metalloids
35
What type of bond is formed between the atoms of this molecule?
organic
metallic
ionic
covalent
36
Organic compounds use prefixes to describe the number of ___ in the compound
hydrogens
functional groups
single bonds
carbons
37
How many valence electrons would any element in Group 17 have?
5
8
6
7
38
What is the correct order in INCREASING radius?
Cl-, K+, Ar
K+, Ar, Cl-
Cl-, Ar, K+
Ar, Cl-, K+
39
The nucleus contains protons and neutrons, which are more massive than electrons. This explains
why most of the mass is in the nucleus
why there are more protons than neutrons
why the nucleus is in the center of an atom
why there are more electrons than protons
40
What type of bond forms between aluminum and fluorine (based on electronegativity)?
polar covalent
metallic
ionic
nonpolar covalent
41
What is the name for the Group 1 elements?
alkaline earth
metalloids
alkali metals
transition metals
42
The nucleus of an atom is composed of
neutrons and electrons
protons and neutrons
electrons only
protons and electrons
43
Which of the following correctly represents STP?
273 K, 1 atm
273 degrees C, 760 torr
0 Km 760 mm Hg
O degrees C, 1 kPa
44
The mass number is always equal to the number of ______ in an atom
protons
neutrons
electrons
protons and neutrons
45
How many valence electrons would any element in Group 15 have?
5
7
8
6
46
Which prefix means the compound has 2 carbons?
pent-
pro-
hept-
eth-
