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Test-2-Review

Total questions: 60

Worksheet time: 48mins

Name
Class
Date
1.

Define a physical change.

a)

A change to a substance that occurs without forming a new substance.

b)

A change in matter that produces one or more new substances.

c)

A change that undergoes a chemical reaction.

d)

None of the above.

2.

Which of the following is a sign that a chemical reaction has occurred?

a)

change in shape

b)

formation of a gas

c)

melting

d)

dissolving

3.
Convert the following: 
35 milliseconds to seconds
a)
0.035 seconds
b)
0.35 seconds
c)
3.5 seconds
d)
0.0035 seconds
4.
What do these isotopes of carbon all have in common?
a)
neutrons & mass number
b)
atomic number and neutrons
c)
atomic number and electrons
d)
protons, atomic number, and mass number
5.
How many neutrons in C-14?
a)
6
b)
7
c)
14
d)
8
6.

A piece of wood is sawed in two.

a)

Physical Change

b)

Chemical Change

7.

An iron shovel is rusting.

a)

Physical Change

b)

Chemical Change

8.

Which is in order from smallest to greatest?

a)

km, m, cm, mm

b)

cm, m, mm, km

c)

mm, cm, m, km

d)

mm, m, cm, km

9.

Density equals...?

a)

Mass divided by Area

b)

Volume divided by Mass

c)

Area divided by Mass

d)

Mass divided by Volume

10.

The plum-pudding model describes atoms as...

a)

Having protons and neutrons evenly distributed throughout the volume of the atom.

b)

Having a small nucleus containing protons and neutrons.

c)

Having electrons evenly distributed throughout the volume of the atom.

d)

Having a small nucleus containing electrons and protons.

11.

Why are atoms neutral?

a)

Because the number of protons is equal to the number of electrons, which is also equal to the number of neutrons

b)

Because the number of protons is equal to the number of electrons

c)

Because the number of electrons exceeds the number of electrons

d)

Because the number of protons exceeds the number of electrons

12.

What makes up most of the mass of an atom?

a)

Neutrons and electrons

b)

Neutrons and protons

c)

Protons and electrons

d)

Protons only

13.

What is the product of 3.7 x 105 and 2.2 x 103 ?

a)

3.7 x 102

b)

5.9 x 108

c)

8.14 x 103

d)

8.14 x 108

14.

You order a TV online that weighs 45 pounds (lbs). How many grams (g) is this? Assume 1.0 lbs=16 oz and 28.4 g=1 oz

a)

25.35g

b)

20,448g

c)

79.88g

d)

204,480g

15.

The iPhone XS has a mass of 174g and a volume of 4.729 in3. What is the density?

a)

169.271 g/in3

b)

822.846 g/in3

c)

0.0273 g/in3

d)

36.79 g/in3

16.
How many sig. fig. are in the number below:
106.00
a)
2
b)
3
c)
4
d)
5
17.
How many sig. fig. are in the number below:
0.678
a)
1
b)
2
c)
3
d)
4
18.
How many sig. fig. are in the number below:
705000
a)
2
b)
3
c)
5
d)
6
19.
Round 1047.78 to three sig figs
a)
104
b)
105
c)
1050
d)
1050.00
20.
Calculate the answer to the following problem and round the final answer to the correct number of sig figs:
24.567 + 0.04478 =
a)
24.61178
b)
24.612
c)
24.611
d)
24.61
21.

What is a positively charged ion that has lost an electron?

a)

Atomic Radius

b)

Cation

c)

Electronegativity

d)

Anion

22.

What is a negatively charged ion that has gained an electron?

a)

Valence Electron

b)

Atomic Radius

c)

Anion

d)

Cation

23.
How many atoms of carbon are in 6.00g of carbon?
a)
1.20x1024atoms C
b)
6.02x1023atoms C
c)
3.01x1023atoms C
d)
1.50x1023atoms C
24.
What is the definition for Avogadro's number?
a)
number of grams per one mole of a substance
b)
whole number ratio that is a multiple of a chemical formula
c)
simplest, whole number ratio of a chemical formula
d)
6.02 x 10^23 particles per one mole of a substance
25.
Which would have more atoms?
a)
1 mole of Li
b)
1 mole of Au
c)
1 mole of Si
d)
None, all are equal
26.
How many grams are in 4.0 moles of Lithium? Round your answer to correct sig figs. 
a)
27.76 g
b)
27 g
c)
27.8 g
d)
28 g
27.
What is the average atomic mass?
a)
The weighted average of all the naturally occurring isotopes.
b)
the same as the mass number
c)
the number of protons and neutrons in the nucleus
d)
the mass of all the electrons in an atom
28.
How many neutrons does 68Zn have
a)
68
b)
38
c)
102
d)
98
29.
A concept in dalton's atomic theory that is no longer considered true.
a)
atoms are the smallest particle
b)
atoms combine in simple whole number ratios
c)
atoms are made up of protons, neutrons and electrons
30.
Discovered the electron with the cathode ray tube experiment.
a)
John Dalton
b)
J.J. Thomson
c)
E Rutherford
d)
Neils Bohr
31.
If 8 grams of A combine with 10 grams of B, how many grams of AB would be formed? (according to the Law of Conservation of Mass and the equation: A + B  --> AB
a)
2
b)
80
c)
18
d)
0
32.

Which of the following is an intensive property of matter?

a)

Boiling point

b)

Volume

c)

Size

d)

Mass

33.

A mixture is created when two substances combine physically and new properties are formed

a)

True

b)

False

34.

What is pictured?

a)

Element

b)

Compound

c)

Heterogeneous mixture

d)

Homogeneous mixture

35.

If the density of copper is 8.96 g/mL, what is the volume of a 2.9 g sample?

a)

25.9 mL

b)

26 mL

c)

0.324 mL

d)

0.32 mL

36.

What is the mass of an atom with 17 protons, 16 neutrons, and 16 electrons?

a)

16 amu

b)

17 amu

c)

32 amu

d)

33 amu

e)

49 amu

37.

What charge will an atom with 8 protons, 9 neutrons, and 10 electrons have?

a)

+2

b)

+1

c)

0

d)

-1

e)

-2

38.

The two common isotopes of Lithium are: 7Li (79%) and 6Li (21%). What is the average atomic mass?

a)

1.26 amu

b)

4.27 amu

c)

5.53 amu

d)

6.79 amu

e)

13.0 amu

39.

How many moles are in 60.0 g of chlorine?

a)

1.69 moles

b)

2 moles

c)

35.45 moles

d)

1.02 x 1024 moles

40.

Which best describes the figure?

a)

element

b)

mixture of compounds

c)

mixture of element and compound

d)

compound

41.

Which best describes the figure?

a)

element

b)

mixture of compound and element

c)

compound

d)

mixture of elements

42.

Evaporation of acetone is an example of:

a)

chemical change

b)

physical change

c)

physical property

d)

chemical property

43.

Elasticity, ductility, malleability and melting point are examples of:

a)

physical change

b)

chemical change

c)

physical property

d)

chemical property

44.

Density, melting point, reactivity with an acid, odor and tendency to corrode are examples ofL

a)

intensive property

b)

extensive property

45.

Mass, volume, length and energy are examples of:

a)

intensive properties

b)

extensive properties

46.

Gasoline, stainless steel, air and dirt are example of :

a)

pure substances

b)

mixtures

47.

Silver, nitrogen gas and carbon monoxide (CO) are example of:

a)

pure substances

b)

mixtures

48.

Steel, salt water and Kool-aid are examples of:

a)

pure substance; elements

b)

pure substance; compounds

c)

mixtures; homogeneous

d)

mixtures; heterogeneous

49.

Dirt, noodle soup, trail mix and oil and water are examples of:

a)

pure substance; elements

b)

pure substance; compounds

c)

mixtures; homogeneous mixtures

d)

mixtures; heterogeneous mixtures

50.
In Dalton's Atomic Theory, all elements consist of __________ that cannot be divided.
a)
Atoms
b)
Parts
c)
Molecules
d)
Hydrogen
51.

Who was the Greek philosopher who called the smallest particle of matter an "atom"?

a)

Democritus

b)

Aristotle

c)

J.J Thompson

d)

Einstein

52.

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

53.
Rutherford's gold foil experiment provided evidence that...
a)
negative and positive charges are spread evenly throughout the atom.
b)
alpha particles have a positive charge.
c)
gold is not a dense as previously thought.
d)
there is a dense positively charged nucleus at the center of an atom.
54.
Which of the following is NOT a part of Dalton's atomic theory?
a)
All elements are composed of atoms.
b)
Atoms are alwyas in motion.
c)
Atoms of the same element are always identical.
d)
Atoms that combine do so in simple, whole-number ratios.
55.
24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?
a)
74.92 amu
b)
24.97 amu
c)
75.01 amu
d)
74.51 amu
56.
An isotope has three forms.  30% have a mass of 4 amu, 20% have a mass of 5 amu and 50% have a mass of 3 amu.  Average atomic mass will be closest to
a)
2 amu
b)
3 amu
c)
4 amu
d)
5 amu
57.
What is the atomic number for an element with 41 neutrons and a mass number of 80?
a)
39
b)
41
c)
80
d)
121
58.
How many electrons does Cu4+ have?
a)
29
b)
33
c)
25
d)
30
59.
How many electrons does S2- have?
a)
16
b)
18
c)
14
d)
12
60.

How many neutron are in the atom "K"?

a)

29

b)

19

c)

58

d)

20

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