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Chemistry Exam

Total questions: 50

Worksheet time: 1hrs 1mins

Name
Class
Date
1.

Which statement best describes an element?

a)

any combination of two or more atoms of different types

b)

a pure substance made up of only one kind of atom

c)

a substance containing only carbon atoms

d)

any kind of crystal

2.

An ionic bond is between

a)

metal and metal

b)

metal and nonmetal

c)

nonmetal and nonmetal

3.

An atom with atomic number 6 would have how many protons?

a)

6

b)

12

c)

3

d)

cannot be determined

4.
Which of the following is a negatively charged subatomic particle?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
5.

How many valence electrons are in the atom "Mg"?

a)

1

b)

5

c)

3

d)

2

6.
What kind of bond forms between two nonmetals?
a)
Covalent bond
b)
Ionic bond
c)
Can be either covalent or ionic
d)
Hydrogen bond
7.

What type of chemical reaction is this one?

CUO + CO2 --> CuCO3

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

8.

What type of chemical reaction is this one?

Ca + MgCl2 --> CaCl2 + Mg

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

9.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
10.
In the equation,          2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
11.
Which equation obeys the law of conservation of mass?
a)
H2 + O2 ------>  H20
b)
C + 2H2 ---->  CH4
c)
2Fe2O3  ------> 2O2 + 4Fe
12.
What is the total number of atoms present in 5Na3PO4?
a)
5
b)
40
c)
55
d)
60
13.

Predict the bond that will form between Sr and S.

a)

Ionic

b)

Covalent

14.

Predict the bond that will form between Se and Cl.

a)

Ionic

b)

Covalent

15.
In chemical compounds, covalent bonds form when
a)
the electronegativity difference between two atoms is very large.
b)
electrons are completely transferred between two metals.
c)
pairs of electrons are shared between two nonmetal atoms.
d)
two nonmetal atoms are attracted to each other by opposite charges.
16.
Nonmetals are located in what section of this periodic table?
a)
Blue
b)
Yellow
c)
Pink
17.

Classify:

Sulfur, S

a)

metal

b)

non-metal

c)

metalloid

18.

How many protons does an atom of Chromium have?

a)

52

b)

24

c)

28

d)

12

19.

An element can be identified by its unique number of -

a)

ions

b)

electrons

c)

protons

d)

neutrons

20.

What is the periodic table mostly made of?

a)

metalloids

b)

nonmetals

c)

metals

21.
The mass number of an element that has18 protons, 18 electrons, and 19 neutrons is _____.
a)
12.5
b)
13
c)
25
d)
37
22.

Is Helium (He) metal, non-metal, or metalloid?

a)

metal

b)

non-metal

c)

metalloid

23.
What charge does a neutron have?
a)
+1
b)
-1
c)
No charge
24.
_______ and _______ are located inside of the nucleus.
a)
Electrons and Protons
b)
Protons and Neutrons
c)
Neutrons and Electrons
25.

How many valence electrons does Lead (Pb) have?

a)

4

b)

12

c)

6

d)

14

26.

How many valence electrons does Sodium (Na) have?

a)

1

b)

2

c)

3

d)

4

27.

How many Aluminum atoms are in Al2O3?

a)

3

b)

5

c)

2

d)

1

28.

Bond Type: Na2Br

a)

Ionic

b)

Covalent

c)

Metallic

29.

Bond Type: CO2

a)

Ionic

b)

Covalent

c)

Metallic

30.

Bond Type: K2Br

a)

Ionic

b)

Covalent

c)

Metallic

31.
Which problem is balanced?
a)
PbO2 + 2H2--> H2SO4
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
d)
2Na + 2H2O --> 2NaOH + H
32.

What are reactants?

a)

The chemicals that start the reaction.

b)

The chemicals that the reaction produced.

c)

The chemicals that are on the right side of the arrow.

33.
Which type of reaction is: C2H4 + 3 O2 → 2 CO2 + 2 H2O
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
34.

Which type of reaction is:

2 NH3 + H2SO4 → (NH4)2SO4

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
35.
These particles orbit around the nucleus of an atom.  What are they called?
a)
electrons
b)
protons
c)
neutrons
d)
photons
36.

Matter is made up of particles that are constantly moving.

a)

True

b)

False

37.
Which changes of state are exothermic changes?
a)
condensation and freezing
b)
melting and evaporation
38.

Which state of matter requires the most energy?

a)

Solids

b)

Liquids

c)

Gases

39.

The Kinetic Molecular Theory states

a)

Particles won't move if you don't apply energy to it.

b)

Particles only move in liquids and gases.

c)

Particles are always in motion.

d)

At the same temperature the object that has the most mass heats quicker.

40.

What state of matter does the picture below represent?

a)

solid

b)

liquid

c)

gas

d)

plasma

41.
What is a Solid?
a)
Matter that has a definite shape and a definite size.
b)
Matter that has a definite size and no definite shape
c)
Matter that has no definite shape or size
d)
Matter that has no definite shape and size
42.
CO2 + H2O → C6H12O6 + 6H2O2
a)
Balanced
b)
Not Balanced
43.
PCl5 + 4 H2O → H3PO4 + 5 HCl
a)
Balanced
b)
Not Balanced
44.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
45.

What category is silicon (Si) a part of?

a)

Metal

b)

Nonmetal

c)

Metalloid

d)

Halogens

46.
Most of the mass of an atom is found it its _____.
a)
electron cloud
b)
nucleus
c)
atomic number
d)
empty space
47.

Which element has 6 protons?

a)

Lithium (Li)

b)

Carbon (C)

c)

Boron (B)

d)

none of the above

48.

Which of the following is an Alkali Metal?

a)

Magnesium (Mg)

b)

Chromium (Cr)

c)

Sodium (Na)

d)

Fluorine (F)

49.

Which of the following is a Noble Gas?

a)

Krypton (Kr)

b)

Chlorine (Cl)

c)

Radium (Ra)

d)

Gallium (Ga)

50.
Which of the following groups is inert? 
a)
Alkali
b)
Transition Metals
c)
Halogens
d)
Noble Gas

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