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Semester 1 final review for Chem- part 1

Total questions: 75

Worksheet time: 1hrs 13mins

Name
Class
Date
1.
A possible explanation to a problem that has not yet been tested. 
a)
data
b)
theory
c)
hypothesis
d)
fact
2.
A series of steps used by scientists to solve a problem or answer a question. 
a)
scientific method
b)
recipe
c)
data collection
d)
metric system
3.

Describes a pattern or event in nature that is always true.

a)

Hypothesis

b)

Problem

c)

Scientific Theory

d)

Scientific Law

4.
Which is NOT a step in the scientific method?
a)
Make observation
b)
Form a theory
c)
Collect data
d)
Form a hypothesis
5.

An explanation based on repeated experimentation and observation.

a)

law

b)

theory

c)

hypothesis

d)

experiment

6.

A law describes what happens while a theory explains why it happens.

a)

True

b)

False

7.

If a theory is tested enough, it will eventually become a law.

a)

True

b)

False

8.

An educated guess based on observations

a)

Law

b)

Theory

c)

Hypothesis

d)

Explanation

9.

The one variable you change is called the

a)

Control

b)

Dependent (outcome) Variable

c)

Independent (test) Variable

d)

Experiment

10.

What is the dependent (outcome) variable in the following experiment? What effect does an increase in temperature have on the melting rate of an ice cube?

a)

Temperature

b)

Size of ice cube

c)

Shape of ice cube

d)

Melting rate of ice cube

11.

What is NOT an intensive property?

(Intensive means to stay the same.)

a)

color

b)

Temperature

c)

Mass

d)

luster

12.

Homogeneous mixtures…

a)

Are solutions

b)

Are liquids

13.

What is the difference between a liquid and a gas?

a)

Gas particles have less energy

b)

Liquid particles have more energy

c)

Gas particles have more energy

d)

Gas and liquid particles have the same energy

14.

A mixture…

a)

Cannot be physically separated into components

b)

Can be separated into components

c)

Sometimes can be separated onto components

d)

Have no components

15.

What is a physical change?

a)

Milk souring

b)

Rust forming

c)

Burning wood

d)

Crushing rocks

16.

What is NOT a chemical change?

a)

Milk souring

b)

Cooking a steak

c)

Rust forming

d)

Boiling water

17.

Which is NOT a physical change?

a)

Water sitting

b)

Carrots on a plate

c)

steak cooking

d)

Chalk breaking

18.

Which is evidence of a chemical change?

a)

Rust forms

b)

Chalk breaking

c)

Water boiling

d)

Crushing rocks

19.

A mixture that is NOT blended smoothly?

a)

Homogeneous

b)

Heterogeneous

c)

Conservative

d)

Sublimation

20.

What is NOT a heterogeneous mixture?

a)

Concrete

b)

Wood

c)

Koolaid

d)

Dirt

21.

What is NOT a homogeneous mixture?

a)

Noodle soup

b)

Water

c)

Liquid

d)

Koolaid

22.
What is at the center of every atom?
a)
An electron
b)
A compound
c)
A molecule
d)
A nucleus
23.
Which two particles make up the nucleus of an atom?
a)
Protons and Electrons
b)
Protons and Neutrons
c)
Molecules and Compounds
d)
Neutrons and Electrons
24.
The particles with no charge in an atom are the _______.
a)
electrons
b)
neutrons
c)
protons
d)
protons and neutrons
25.
The positively charged particles of an atom are the ________.
a)
electrons
b)
protons
c)
neutrons
d)
protons & neutrons
26.
The negatively charged particles of an atom are the ______.
a)
electrons
b)
protons
c)
neutrons
d)
protons & neutrons
27.
A particle that moves around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
28.
What number indicates an electron?
a)
1
b)
2
c)
3
d)
4
29.
What is the mass number?
a)
the number of protons
b)
the sum of the number of protons and the number of neutrons in the nucleus of an atom 
c)
the number of electrons
d)
the number of neutrons
30.
What is the atomic number?
a)
number of protons
b)
number of neutrons
31.
Oxygen’s atomic number is 8. This means that an oxygen atom must have
a)
8 electrons
b)
8 protons
c)
8 neutrons
d)
a mass number of 8
32.
 What is the mass number of this element?
a)
5
b)
27
c)
32
d)
59
33.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
34.
All matter is made of what?
a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
35.

An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?

a)

15

b)

31

c)

16

d)

47

36.
An atom has an atomic number of 19 and a mass number of 29. How many neutrons are in the atom?
a)
30
b)
19
c)
10
d)
38
37.

The electron cloud model is made up of mostly....

a)

electron cloud

b)

empty space

c)

neutrons

d)

protons

38.

Which subatomic particle is used to identify the atom, as it never changes?

a)

protons

b)

neutrons

c)

electrons

39.
Which of the following particle pairs has approximately the same mass?
a)
protons and neutrons
b)
protons and electrons
c)
neutrons and electrons
d)
protons, neutrons and electrons
40.
An atom is electrically neutral when
a)
protons and neutrons are the same
b)
protons and electrons are the same
c)
neutrons and electrons are the same
d)
neutrons balance the protons and electrons
41.
Iron-60 (atomic number 26) is an isotope that is often used to study meteorites.  How many neutrons does iron-60 have?
a)
26
b)
60
c)
34
d)
86
42.
How many protons does this isotope of titanium have? Hint titanium has an atomic number of 22.
a)
48
b)
22
c)
26
d)
70
43.

How many neutrons does this bromine atom have?

a)

35

b)

45

c)

80

44.
If the number of electrons in an atom changes you make a(n) __________________.
a)
ion
b)
isotope
c)
new element
d)
isomer
45.

How many electrons are in an atom with atomic number 34 mass number of 74, and a charge of -2?

a)

34

b)

36

c)

2

d)

40

46.
If an atom has more electrons than protons, it is a(n)
a)
Positive ion
b)
Negative ion
c)
Isotope
d)
Neutral atom
47.

The number of protons + neutrons in an atomic nucleus is referred to as what?

a)

Atomic number

b)

Atomic mass

c)

Mass number

48.

Atoms of the same element with differing number of electrons are called ________.

a)

elements

b)

atoms

c)

ions

d)

isotopes

49.

Atoms of the same element with differing numbers of neutrons are _______________.

a)

isotopes

b)

ions

c)

elements

d)

nucleus

50.

Which is the correct symbol for Fluorine-18?

a)
b)
c)
d)
51.
Who was the first person to study atomic theory?
a)
Dalton
b)
Democritus
c)
Chadwick
d)
Miller
52.
Rutherford’s experiment determined that the nucleus of an atom is tiny, dense and  ______ charged. 
a)
neutrally
b)
negatively
c)
positively
53.

What were Ernest Rutherford's three contributions to atomic theory?

a)

Discovered that the atom is mostly empty space

b)

Discovered the nucleus- did the gold foil experiment

c)

Used the cathode ray tube in his discovery

d)

Discovered the electron

e)

Discovered that the proton had a positive charge

54.

What is the name of group number 1?

a)

halogens

b)

noble gases

c)

alkali metals

d)

alkaline earth metals

55.

What is the name of group number 2?

a)

transition metals

b)

halogens

c)

metaloids

d)

alkaline earth metals

56.

where are the metaloids found

a)

far left, vertical

b)

stair step/diagonal

c)

far right horizontal

d)

at the bottom

57.

What group number are the halogens found?

a)

18 (8A)

b)

1

c)

2

d)

17 (7A)

58.

Periodic law states that the elements are arranged according to their atomic ________ so that elements with similar chemical properties are in the same ________ and properties repeat periodically.

a)

numbers, rows

b)

masses, rows

c)

masses, column

d)

numbers, column

59.

A row on the Periodic Table of Elements

a)

family

b)

period

c)

row

d)

isotope

60.
___________ is the only metal that is a liquid at room temperature.
a)
Platinum
b)
Water
c)
Tin
d)
Mercury
61.

Metals (select all that apply)

a)

are found on the right side of the periodic table.

b)

are found on the left side of the periodic table.

c)

are good conductors of heat and electricity.

d)

are brittle.

e)

are malleable and ductile.

62.

Nonmetals (select all that apply)

a)

are found on the right side of the periodic table.

b)

are found on the left side of the periodic table.

c)

are good conductors of heat and electricity.

d)

are brittle.

e)

can be solid, liquids, or gases at room temperature.

63.

Which element is found in group 2, period 6?

a)

Oxygen (O)

b)

Barium (Ba)

c)

Selenium (Se)

d)

Carbon (C)

64.

Which halogen is found in period 4?

a)

Krypton (Kr)

b)

Xenon (Xe)

c)

Bromine (Br)

d)

Iodine (I)

65.

Which element has similar chemical properties as sodium but has 7 energy levels?

a)

Francium (Fr)

b)

Cesium (Cs)

c)

Rubidium (Rb)

d)

Potassium (K)

66.
The number at the bottom of each square on the periodic table is the ...
a)
atomic number
b)
atomic mass
c)
chemical symbol
d)
element name
67.

Which family on the periodic table is very stable due to the fact that they have a full outer shell

a)

Noble gases

b)

Alkali metals

c)

Halogens

d)

Alkaline earth metals

e)

Rare earth elements

68.

Hydrogen is grouped with the alkali metals because it

a)

Is a gas

b)

Has one electron in its outer energy level

c)

Is a metal

d)

Does not readily form compounds

69.

A family that contains the most reactive metals is the

a)

Transition metals

b)

Alkaline earth metals

c)

Alkali metals

d)

Noble gases

70.

Which family is group 2 elements that have 2 outer (valence) electrons

a)

Noble gases

b)

Alkali metals

c)

Halogens

d)

Alkaline earth metals

e)

Rare earth elements

71.

Which of the following is a nonmetal?

a)

Aluminum

b)

Hydrogen

c)

Silicon

d)

Uranium

72.

Which family has reactive elements in group 17 that are poor conductors?

a)

Noble gases

b)

Alkali metals

c)

Halogens

d)

Alkaline earth metals

e)

Rare earth elements

73.

Which statement best describes the relationship between Helium, Neon, Argon and Xenon?

a)

They are all in the same period

b)

They are all in the same group

c)

They are all liquids

d)

They are all man-made

74.

Atoms of elements that are in the same group have the same number of

a)

Neutrons

b)

Valence Electrons

c)

Protons and neutrons

d)

Protons

75.

Which family on the periodic table is very stable due to the fact that they have a full outer shell

a)

Noble gases

b)

Alkali metals

c)

Halogens

d)

Alkaline earth metals

e)

Rare earth elements

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