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WorksheetsAtoms and Molecules
Total questions: 21
Worksheet time: 11mins
Name
Class
Date
1.
Which is smallest
a)
Atom
b)
Electron
c)
Cell
d)
Molecule
2.
What is the charge of an electron?
a)
+1
b)
-1
c)
0
3.
When atoms bond to form molecules, they share...
a)
protons
b)
neutrons
c)
electrons
d)
sandwiches
4.
How many hydrogen atoms are in a water molecule?
a)
1
b)
2
c)
3
d)
0
5.
The beginning substances in a chemical reaction are called...
a)
reactants
b)
products
6.
C is the chemical symbol for...
a)
Carbon
b)
Calcium
c)
Chlorine
d)
Californium
7.
He is the chemical symbol for
a)
Hydrogen
b)
Helium
c)
Hexane
d)
Hufflepuff
8.
Hydrogen usually has one proton, but sometimes it has two.
a)
True
b)
False
9.
Which of the following is NOT a physical property?
a)
iron can oxidize into rust
b)
water freezes at 32 degrees F
c)
Gold is shiny and metallic
d)
Helium is lighter than Oxygen
10.
Order elements from lowest number of protons to the highest
a)
O, Ar, H
b)
H, Ar, O
c)
H, O, Ar
11.
Each energy shell can hold the exact same number of electrons.
a)
True
b)
False
12.
Atoms form bonds until their outermost energy shell is full.
a)
True
b)
False
13.
Pencil lead is made of...
a)
Hydrogen
b)
Carbon
c)
Oxygen
d)
Iron
14.
How many oxygen atoms are in one molecule of carbon dioxide?
a)
1
b)
2
c)
3
d)
4
15.
Glucose, a simple sugar, is made of which atoms?
a)
C, H, O
b)
He, Fe, N
c)
C, N, O
d)
C, He, O
16.
What is the chemical symbol for the element Chlorine?
a)
C
b)
Ci
c)
Cn
d)
Cl
17.
H2SO4 contains how many atoms?
a)
3
b)
4
c)
6
d)
7
18.
C6H12O6 is made of how many atoms?
a)
3
b)
6
c)
12
d)
24
19.
How many atoms are in five molecules of water (H2O)
a)
3
b)
5
c)
10
d)
15
20.
How many molecules of oxygen gas (O2)
are needed to make 10 molecules of water (H20)?
are needed to make 10 molecules of water (H20)?
a)
2
b)
5
c)
10
d)
11
21.
Luis' Birthday is on what day?
a)
March 11
b)
February 11
c)
April 11
d)
January 11
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