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WorksheetsCompounds and Molecules
Total questions: 20
Worksheet time: 17mins
Name
Class
Date
1.
Air is a mixture of several different kinds of molecules.
a)
True
b)
False
2.
The tiniest bit of water that still is water is a molecule of water.
a)
True
b)
False
3.
An oxygen molecule usually has two oxygen atoms.
a)
True
b)
False
4.
Hydrogen is a compound.
a)
True
b)
False
5.
The properties of a compound are always the same as the properties of the elements in the compound.
a)
True
b)
False
6.
Carbon dioxide is a compound.
a)
True
b)
False
7.
Fleece is a material that can be made from recycled plastic soda bottles.
a)
True
b)
False
8.
"Bone cement" is made up of one atom of hydrogen and two atoms of oxygen.
a)
True
b)
False
9.
Many new materials are made up of a few kinds of molecules joined together in very long chains.
a)
True
b)
False
10.
Salt is an example of a compound.
a)
True
b)
False
11.
Two or more atoms joined together make up a _____.
a)
compound
b)
molecule
c)
solution
12.
A substance that is made up of atoms of more than one element is a _______.
a)
compound
b)
rust
c)
molecule
13.
Oxygen in the air combines with iron molecules on a frying pan to form _______.
a)
chemical property
b)
physical property
c)
rust
14.
The center of an atom is the _____.
a)
electron
b)
nucleus
c)
neutron
15.
In an expression H2O the "2" represents ____.
a)
2 atoms of hydrogen
b)
2 atoms of oxygen
c)
2 molecules of water
16.
A new material discovered for the medical field is _____.
a)
fleece
b)
Gore-Tex
c)
bone cement
17.
Groups of elements are found in the periodic table in ___.
a)
columns
b)
rows
c)
diagonals
18.
Matter has mass and takes up ____.
a)
mixture
b)
compound
c)
space
19.
The smallest unit of a compound is a ___.
a)
molecule
b)
atom
c)
matter
20.
Which of these is an example of a compound?
a)
iron
b)
calcium
c)
rust
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