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Chemistry Midterm Review 2021

Total questions: 54

Worksheet time: 2hrs 12mins

Name
Class
Date
1.
What is the answer to the following problem rounded to the correct number of significant figures? 10.02 x 4.5?
a)
45
b)
45.09
c)
50
d)
45.1
2.
How many significant figures are in the number 10.040?
a)
5
b)
4
c)
3
d)
2
e)
1
3.

Which of the following is/are physical intensive properties? (Select all that apply)

a)

malleability

b)

density

c)

volume

d)

mass

4.
Which of the following is NOT a chemical property?
a)
Ductility
b)
Flammability
c)
Reactivity
d)
Toxicity
5.

Which property listed below is labeled incorrectly?

a)

Color - chemical property

b)

Toxicity - chemical property

c)

Boiling Point - physical property

d)

Length - physical property

6.

A US nickel has a mass of 5.000 grams and a volume of 0.689 mL. What is the density of a US nickel?

a)

7.26 g/mL

b)

8.45 g/mL

c)

6.69 g/mL

d)

8.91 g/mL

7.

A soda can has a volume of 355 mL and a mass of 384 g. Calculate the density of this soda can.

a)

1.08 g/mL

b)

0.924 g/mL

c)

0.739 g/mL

d)

0.136 g/mL

8.

A sample of pure water is an example of what type substance?

a)

compound

b)

atom

c)

element

d)

mixture

9.

Which of the following states of matter are compressible? (Select all that apply)

a)

gas

b)

solid

c)

liquid

10.
A student makes salad dressing by combining vegetable oil, vinegar, salt, pepper, mustard, and thyme. None of the ingredients are measured. The next time the student makes salad dressing, basil is used in place of the thyme. Which classification best describes the salad dressing?
a)
element
b)
compound
c)
homogeneous mixture
d)
heterogeneous mixture
11.

Which statement is correct about a sample of liquid water?

a)

It has a definite volume and a definite shape.

b)

It has definite volume but no definite shape.

c)

It has no definite volume and no definite shape.

d)

It has no definite volume but has a definite shape.

12.

Who made this model of the atom?

a)

John Dalton

b)

J. J. Thomson

c)

Earnest Rutherford

d)

Niels Bohr

13.

Who made this model of the atom?

a)

John Dalton

b)

J. J. Thomson

c)

Earnest Rutherford

d)

Niels Bohr

14.

How many neutrons does carbon-14 have?

a)

8

b)

7

c)

6

d)

5

15.

The imaginary element Elginium has 2 stable isotopes. Isotope 1 has an atomic mass of 77.5 amu and a percent abundance of 80.0%. Isotope 2 has an atomic mass of 84.2 amu and a percent abundance of 20.0%. What is the average atomic mass of the not real element Elginium?

a)

78.84 amu

b)

84.2 amu

c)

65.8 amu

d)

69.3 amu

16.

Calculate the average atomic mass of the element from the following isotopes and percent abundances

a)

24.32 amu

b)

25.00 amu

c)

28.88 amu

d)

21.43 amu

17.

Radar detectors use radio waves to measure the speed of moving vehicles. Radar detectors have a wavelength of 180 meters. What is the frequency of waves from a radar detector?

a)

1.67 x 10^ 6 Hz

b)

6.00 x 10^5 Hz

c)

6.00 x 10^2 Hz

d)

1.67 x 10^3 Hz

18.

What element is in group 11 period 6?

a)

Gold

b)

Silver

c)

Osmium

d)

Titanium

19.

What is the group and period for uranium (U)?

a)

group actinides, period 7

b)

group lanthanides, period 6

c)

group 6, period 2

d)

group 8, period 6

20.

What would be the family of a hard, dense, shiny element that forms colorful compounds and does not react violently with water?

a)

Transition metals

b)

Alkali metals

c)

Alkaline earth metals

d)

Metalloids

21.

What family is sodium (Na) in?

a)

Alkali metals

b)

Alkaline earth metals

c)

Transition metals

d)

Lanthanides

22.

Which is the correct Lewis dot structure for ammonia NH3?

a)
b)
c)
d)
23.

Which is the correct Lewis dot structure for MgO?

a)
b)
c)
d)
24.

Which is the correct Lewis dot structure for carbon dioxide CO2?

a)
b)
c)
d)
25.

What is the expanded electron configuration for phosphorous?

a)

1s² 2s² 2p⁶ 3s² 3p³

b)

1s² 2s² 2p⁶ 3s²

c)

1s² 2s² 2p⁶ 3s² 3p⁶

d)

1s² 2s² 2p⁶

26.

What is the correct shortened electron configuration for Bromine?

a)

[Ar] 4s2 3d10 4p5

b)

[Kr] 4p5

c)

[Ar] 4s2 3d10 4p6 5s1

d)

[Kr] 4s2 3d10

27.

Which of the following is the correct Lewis dot structure for aluminimium?

a)
b)
c)
d)
28.
Which particles are represented by the dots in Lewis dot structures?
a)
valence electrons
b)
neutrons
c)
protons
d)
all electrons
29.

What is the most number of energy levels an atom can have?

a)

7

b)

8

c)

14

d)

10

30.

What sublevel is this?

a)

p

b)

d

c)

s

d)

f

31.

Which is the correct energy level diagram for sodium Na?

a)
b)
c)
d)
32.

Which of these depicts a metallic bond?

a)
b)
c)
33.

What molecular shape does CH4 have?

a)

tetrahedral

b)

linear

c)

bent

d)

trigonal planar

34.

What molecular shape does CH2O have?

a)

trigonal planar

b)

linear

c)

bent

d)

tetrahedral

35.

What is the shape of a CO2 molecule?

a)

linear

b)

tetrahedral

c)

trigonal planar

d)

bent

36.

Around the central atom in a covalently bonded molecule, there are four pairs of electrons: three shared pairs and one unshared pair. The geometry of this molecule is best described as —

a)

trigonal pyramidal

b)

trigonal planar

c)

linear

d)

tetrahedral

37.
Which of these is an ionic compound?
a)
MgO
b)
CO2
c)
CCl4
d)
Fe(IV)Cr
38.

What would be the charge of a nitrogen ion? (use the location of element in the periodic table)

a)

3-

b)

2-

c)

3+

d)

2+

e)

1-

39.

What kind of bond is this? (choose all that apply)

a)

covalent bond

b)

double bond

c)

metal bond

d)

triple bond

40.

How many electrons total are in this bond?

a)

4

b)

6

c)

2

d)

8

41.
What is the IUPAC name for KCl?
a)
potassium chloride
b)
sodium chloride
c)
kalcium carbonite
d)
magnesium chloride
42.
What is the IUPAC name for Na2Cr2O7?
a)
sodium dichromate
b)
potassium chromate
c)
magnesium chromate
d)
nickel dichromate
43.
What is the IUPAC name for CuSO4?
a)
copper(II) sulfate
b)
copper(II) hydroxide
c)
copper(II) chlorate
d)
copper(I) sulfite
44.
What is the IUPAC name for H2O2?
a)
dihydrogen dioxide
b)
hydrogen dioxide
c)
hydrogen oxide
d)
monohydrogen trioxide
45.
What is the IUPAC name for N2H4?
a)
dinitrogen tetrahydride
b)
tetranitride dihydrogen
c)
nitrogen(II) hydride(IV)
d)
nitrogen hydrogen
46.
What is the chemical formula dihydrogen monoxide?
a)
H2O
b)
H2O2
c)
CO2
d)
OH
47.
What is the chemical formula for magnesium nitride?
a)
Mg3N2
b)
NMg
c)
Mn2N3
d)
MgN
48.
What is the chemical formula for potassium iodide?
a)
KI
b)
PI
c)
NaI
d)
PIO
49.
What is the chemical formula tetracarbon decahydride?
a)
C4H10
b)
CH
c)
C3H6
d)
4C10H
50.
What is the chemical formula for aluminum sulfate?
a)
Al2(SO4)3
b)
Al3(SO4)2
c)
AlSO4
d)
AlS
51.
What is the chemical formula for the base sodium hydroxide?
a)
NaOH
b)
SHO
c)
SOH
d)
NaH2O2
52.
What is the formula for hydrochloric acid?
a)
HCl
b)
HA
c)
HCl10
d)
H2OCl
53.

Which best describes a bond between a hydrogen atom and an oxygen atom?

a)

polar covalent

b)

nonpolar covalent

c)

ionic

d)

metallic

54.

Which best describes a bond between a lithium atom and a chlorine atom?

a)

polar covalent

b)

nonpolar covalent

c)

ionic

d)

metallic

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