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Chemistry RA Midterm Review

Total questions: 40

Worksheet time: 20mins

Name
Class
Date
1.

Which branch studies processes in living organisms?

a)

physical chemistry

b)

inorganic chemistry

c)

organic chemistry

d)

biochemistry

e)

analytical chemistry

2.

Which branch studies how matter changes, including mechanism, rate, and energy transfer?

a)

analytical chemistry

b)

biochemistry

c)

inorganic chemistry

d)

organic chemistry

e)

physical chemistry

3.

Which branch studies chemicals containing carbon?

a)

biochemistry

b)

physical chemistry

c)

analytical chemistry

d)

organic chemistry

e)

inorganic chemistry

4.

Which branch studies chemicals that do not contain carbon?

a)

physical chemistry

b)

analytical chemistry

c)

inorganic chemistry

d)

organic chemistry

e)

biochemistry

5.

Which branch studies the composition of matter?

a)

analytical chemistry

b)

biochemistry

c)

physical chemistry

d)

organic chemistry

e)

inorganic chemistry

6.

What is the smallest particle of an element that keeps its properties?

a)

atom

b)

nucleus

c)

electron

d)

neutron

e)

proton

7.

Which particle has a positive charge?

a)

electron

b)

atom

c)

nucleus

d)

proton

e)

neutron

8.

Which particle has a negative charge?

a)

nucleus

b)

proton

c)

atom

d)

electron

e)

neutron

9.

Which particle has no charge?

a)

atom

b)

neutron

c)

proton

d)

electron

e)

nucleus

10.

What part of an atom contains protons and neutrons?

a)

electron

b)

neutron

c)

nucleus

d)

atom

e)

proton

11.

A theory is a _____.

a)

proposed explanation for an observation

b)

well-tested explanation for a broad set of observations

c)

procedure used to test a proposed explanation

d)

summary of the results of many observations

12.

A horizontal row in the periodic table is called a

a)

property.

b)

family.

c)

period.

d)

group.

13.

Which of these is a physical property?

a)

ability to rust

b)

explosive

c)

combustible

d)

melting point

14.

Which state of matter has a definite volume and takes the shape of its container?

a)

Solid

b)

Liquid

c)

Gas

d)

Liquid and Gas

15.

Which state of matter takes the shape and volume of its container?

a)

solid

b)

liquid only

c)

gas only

d)

both b and c

16.

Which state of matter has an indefinite shape but a definite volume?

a)

both b and c

b)

liquid only

c)

solid only

d)

gas

17.

Which state of matter has a definite shape and volume?

a)

gas

b)

both b and c

c)

solid only

d)

liquid only

18.

Which of these is a physical change?

a)

rotting of food

b)

explosion

c)

evaporation

d)

corrosion

19.

Which of the following is a heterogeneous mixture?

a)

Air

b)

Vinegar in water

c)

Milk

d)

Oil and vinegar

20.

Which of the following is a homogeneous mixture?

a)

Soil

b)

Salt water

c)

Beef stew

d)

Sand and water

21.

The symbol for iron is ______.

a)

fe

b)

FE

c)

Fe

d)

Ir

22.

Which of the following is a chemical property?

a)

Color

b)

Hardness

c)

Freezing point

d)

Ability to react with oxygen

23.

Which of the following is a chemical change?

a)

grating cheese

b)

melting cheese

c)

fermenting cheese

d)

mixing cheeses

24.

Express 5008 km in scientific notation.

a)

50.08 × 10^{-4} km

b)

5.008 × 10^{-3} km

c)

5.008 × 10^4 km

d)

5.008 × 10^3 km

25.

The smallest particle of an element that keeps its properties is a(n) _____.

a)

atom

b)

electron

c)

neutron

d)

proton

26.

Which particles are found in the nucleus of an atom?

a)

neutrons and electrons

b)

protons and electrons

c)

electrons only

d)

protons and neutrons

27.

An element has atomic number 89. How many protons and electrons are in its neutral atom?

a)

71 protons and 89 electrons

b)

89 protons and 0 electrons

c)

88 protons and 88 electrons

d)

89 protons and 89 electrons

28.

Isotopes of an element have different _____.

a)

atomic numbers

b)

numbers of electrons

c)

numbers of protons

d)

numbers of neutrons

29.

An atom has atomic number 50 and mass number 125. How many protons, electrons, and neutrons does it have?

a)

50 protons, 50 electrons, 75 neutrons

b)

75 electrons, 50 protons, 50 neutrons

c)

120 neutrons, 50 protons, 75 electrons

d)

70 neutrons, 75 protons, 50 electrons

30.

What is the electron configuration of potassium?

a)

1s2 2s2 2p6 3s2 3p6 4s1

b)

1s2 2s2 2p6 3s2 3p6 4s1

c)

1s2 2s2 2p10 3s2 3p3

d)

1s2 2s2 3s2 3p6 3d1

31.

What is the SI unit of mass?

a)

kilogram

b)

candela

c)

joule

d)

liter

32.

The nucleus of an atom is _____.

a)

negatively charged and has low density

b)

positively charged and has more protons than neutrons

c)

negatively charged and has high density

d)

the central core made of protons and neutrons

33.

The total number of protons and neutrons in an atom is called the _____.

a)

atomic number

b)

atomic mass

c)

nucleus number

d)

mass number

34.

Which unit measures atomic mass?

a)

nanogram

b)

angstrom

c)

gram

d)

amu

35.

How many electrons are in the outermost shell of an oxygen atom?

a)

2

b)

4

c)

8

d)

6

36.

Convert 0.05 grams to kilograms. (1000 grams = 1 kilogram)

a)

5.0 × 10−510^{-5} kg

b)

5.0×10−4kg5.0 \times 10^{-4} kg

c)

5.0×10−3kg5.0 \times 10^{-3} kg

d)

5.0×10−2kg5.0 \times 10^{-2} kg

37.

An element X has 10% of isotope 55X, 20% of isotope 56X, and 70% of isotope 57X. What is the atomic mass of X?

a)

56.6 amu

b)

56.8 amu

c)

56.9 amu

d)

57.0 amu

38.

What is the electron configuration of beryllium?

a)

1s2 2p2

b)

1s2 2s1 2p1

c)

1s2 2s2

d)

1s1 2s2

39.

What is the electron configuration of a neutral chlorine atom?

a)

[Ne] 3s1 3p6

b)

[Ne] 3s2 3p6

c)

[He] 2s2 2p5

d)

[Ne] 3s2 3p5

40.

How many periods are in the periodic table?

a)

7

b)

6

c)

8

d)

9

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