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Chemistry Midterm Review

Total questions: 40

Worksheet time: 3585secs

Name
Class
Date
1.
How many significant figures: 153.0 mL
a)
1
b)
2
c)
3
d)
4
2.
How many significant figures: 0.012 km
a)
1
b)
2
c)
3
d)
4
3.
Solve. Round using SigFig math rules.
12.5-mL + 20.05-mL + 2.69-mL
a)
35-mL
b)
35.2-mL
c)
35.24-mL
d)
35.240-mL
4.

67 seconds + 10.1 seconds = ?

a)

77.1

b)

77

c)

70

d)

80

5.
Solve & Round to Correct Sig Figs.
4.5 x 2.34 = 
a)
11
b)
10.52
c)
10.5
d)
10
6.
Valence electrons are: 
a)
Electrons farthest away from the nucleus
b)
Electrons closest to the nucleus
c)
Electrons that just come and go - they don't stay with the atom
7.
Ions are: 
a)
atoms with a positive or negative charge
b)
atoms with no charge
c)
atoms with ONLY a positive charge
d)
atoms with ONLY a negative charge
8.
When an atom loses a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
9.

Anions are

a)

Negative ions

b)

Neutral ions

c)

Positive ions

10.

Cations are

a)

negative ions

b)

neutral electrons

c)

positive ions

11.
What is an isotope? 
a)
A charged atom
b)
An atom with different amounts of neutrons
c)
An atom with different amounts of protons
d)
A neutral atom
12.
The photo above shows the isotopic notation for which isotope?
a)
Carbon 12
b)
Carbon 13
c)
Carbon 14
d)
Carbon 15
13.
The photo above shows the isotopic notation for which isotope?
a)
Carbon 12
b)
Carbon 13
c)
Carbon 14
d)
Carbon 15
14.
Different isotopes have...
a)
different masses
b)
different atomic numbers
c)
different electrons
d)
different protons
15.
How many neutrons does a Calcium 48 isotope have?
a)
16
b)
20
c)
28
d)
12
16.

Which scientist discovered the electrons?

a)

Dalton

b)

Thomson

c)

Atristotle

d)

Bohr

17.

Which of the following is/are conclusions based on Rutherford’s gold foil experiment?

a)

Atom is mostly empty space

b)

The nucleus is positively charged

c)

The atom has a small dense nucleus

d)

All answers are correct

18.
J.J. Thomson provided evidence that an atom...
a)
is the smallest particle of matter
b)
contains negatively charged particles
c)
has an overall negative charge
d)
has an overall positive charge
19.

The majority of an atom's mass exists where?

a)

In the nucleus

b)

In the electron cloud

c)

In the space between the nucleus and the electrons

d)

In the neutrons

20.

How many protons does sulfur have?

a)

32

b)

16

c)

48

d)

12

21.
Which subatomic particles are found in the nucleus of an atom?
a)
Protons and Electrons
b)
Protons and Neutrons
c)
Neutrons and Electrons
d)
Protons, Neutrons and Electrons
22.

What mass does a neutron have?

a)

1 amu

b)

0 amu

c)

-1 amu

d)

+2 amu

23.
Complete the statement:
5 cm/min = ______ m/day
(100 cm = 1 m)
a)
72
b)
840
c)
7.2
d)
5,040,000
24.
What is the formula for density?
a)
density = mass x volume
b)
density = mass / volume
c)
density = mass + volume
d)
density = mass - volume
25.

Calculate the volume of a liquid with a density of 5.45 g/mL and a mass of 65g.

a)

14.93 mL

b)

11.93 mL

c)

100.1193 mL

d)

IDK

26.

A box measures 20 cm x 8 cm x 14 cm and has a mass of 226.8 g. What is the density of the block?

a)

0.101 g/cm3

b)

9.88 g/cm3

c)

5.4 g/cm3

27.
What atom matches this electron configuration?
1s2 2s2 2p6 3s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
28.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
29.

There are 4 different types of sub-levels s,p,d,f

a)
true
b)
false
30.
Electrons occupy orbitals of lowest energy first is part of what electron configuration rule?
a)
Hund’s Rule
b)
Aufbau Principle
c)
Pauli Exclusion Principle
31.
Which is the electron configuration for an oxygen atom?
a)
1s22s22p63s23p64s2
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p6
32.
This orbital diagram represents:  
a)
C
b)
B
c)
N
d)
O
33.
 The diagram above represents two electrons with 
a)
a. opposite spins.
b)
 b. the same spin.
c)
c. different energies.
d)
d. different energy levels.
34.

Which of the following is written correctly?

a)

A

b)

B

c)

C

d)

D

35.

What element's orbital notation is pictured here?

a)

Ar

b)

Br

c)

Cu

d)

Cl

36.
At higher temperatures
a)
particles in an object have less energy
b)
particles in an object move faster
c)
a gas contracts
37.
A gas
a)
has a definite shape but no definite volume
b)
has a definite volume but no definite shape
c)
has fast-moving particles
38.

Which element has a larger radius?

a)

Oxygen (O)

b)

Sulfur (S)

c)

Tellurium (Te)

d)

Polonium (Po)

39.
What is the noble gas configuration for beryllium?
a)
[He]1s2
b)
[He]2s2
c)
[Li]2s1
d)
[Li]2s2
40.
What atom matches this electron configuration?
1s22s22p63s23p64s23d10
a)
Zinc
b)
Copper
c)
Nickel
d)
Germanium

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