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Compounds, Elements, Periodic Table

Total questions: 30

Worksheet time: 40mins

Name
Class
Date
1.
Water is an example of a(n) 
a)
element 
b)
compound 
2.

What is a substance that is made of only one atom?

a)

element

b)

solution

c)

compound

3.

Carbon and oxygen combine chemically to form carbon dioxide. Carbon dioxide is

a)

an ion

b)

a nucleus

c)

a compound

d)

an atom

4.

2 atoms of hydrogen and 1 atom of oxygen combine to form water. What is the chemical formula for water?

a)

H₂O

b)

H₂O₂

c)

HO₂

5.

Subscripts are used to identify the number of atoms in a compound. How many atoms of carbon are in C₆H₈O₆? (Better known as Vitamin C.)

a)

8

b)

6

c)

12

d)

20

6.

Hydrogen Peroxide has a chemical formula of H₂O₂. Which atoms make up this compound?

a)

2 atoms of hydrogen and 1 atom of oxygen

b)

1 atom of hydrogen and 2 atoms of oxygen

c)

2 atoms of hydrogen and 2 atoms of oxygen

7.
The smallest particles of an element that still have the element’s properties are
a)
quarks
b)
gluons
c)
protons
d)
atoms
8.
Which statement is true about the nucleus of an atom?
a)
It makes up most of the atom’s volume
b)
It makes up most of the atom’s mass
c)
It contains protons and electrons
d)
It is neutral in electric charge
9.
The mass number of an atom is its number of
a)
electrons
b)
protons
c)
neutrons
d)
protons + neutrons
10.
When a fluorine atom gains an electron, it becomes a(n)
a)
positive ion
b)
negative ion
c)
isotope
d)
atom
11.
Electrons have the same mass as protons
a)
True
b)
False
12.
Atoms of a given element all have the same number of
a)
protons
b)
neutrons
c)
electrons
d)
two of the above
13.
Protons and neutrons have the same mass
a)
True
b)
False
14.
Mendeleev organized the elements based on their
a)
Atomic Number
b)
Number of Protons
c)
Atomic Mass
d)
Number of Neutrons
15.
In the modern periodic table, atomic number
a)
increases from top to bottom within each period
b)
increases from left to right within each group.
c)
two of the above
d)
none of the above
16.
The shortest period in the periodic table is period
a)
18
b)
7
c)
6
d)
1
17.
All but one of the elements on the left side of the periodic table are
a)
metalloids
b)
nonmetals
c)
metals
d)
gases
18.
Which statement is true about any group in the periodic table?
a)
It includes metals, metalloids, and nonmetals
b)
It includes elements with similar properties.
c)
It includes gases, liquids, and solids
d)
It contains 18 different elements
19.
Mendeleev left spaces in his periodic table for unknown elements
a)
True
b)
False
20.
Elements in the same period of the periodic table have similar properties.
a)
True
b)
False
21.
A nonmetal is an element that
a)
exists only as a gas or liquid
b)
is completely unreactive
c)
cannot conduct electricity
d)
is shiny and malleable
22.
If an element is malleable, this means that it can
a)
be formed into long thin shapes like wires
b)
formed into thin sheets without breaking
c)
be used to conduct electric current
d)
used as an electric insulator
23.

Protons and neutrons are found in the center of the atom called the:

a)

nucleus

b)

neutron

c)

shell

d)

cell

24.

The subatomic particles are called:

a)

protons, nucleus and electrons

b)

protons, electrons and neutrons

c)

protons, positives and negatives

d)

cloud, shell and quarks

25.

Electrons have a _____ charge.

a)

neutral

b)

negative

c)

positive

d)

both positive and negative

26.

What subatomic particle is represented by this symbol (+):

a)

neutron

b)

proton

c)

electron

27.

What subatomic particle is represented by this charge (-):

a)

neutron

b)

proton

c)

electron

28.

Why do the electrons surround the nucleus?

a)

the negative electrons are attracted to the neutral neutrons

b)

the negative electrons are repelled by the neutral neutrons

c)

the negative electrons are attracted to the positive protons

d)

the negative electrons are repelled by the positive protons

29.

All matter is made of _____.

a)

light

b)

energy

c)

cells

d)

atoms

30.

How many Carbon are in the compound?

a)

4

b)

5

c)

20

d)

9

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