Structure Of The Atom Worksheet With Answer Key
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22ChemQuest 8
Name: ____________________________
Date: _______________
Hour: _____
Information: Structure of the Atom
Note the following symbols: (they are not to scale)
= proton (positive charge)
= electron (negative charge)
= neutron (no charge)
The following three diagrams are hydrogen atoms:
2
3
1
H
H
H
1
1
1
The following three diagrams are carbon atoms:
12
13
14
C
C
C
6
6
6
(6 protons, 6 neutrons) (6 protons, 7 neutrons)
(6 protons, 8
neutrons)
Notice the type of notation used for atoms:
A
X
Z
X = chemical symbol of the element
Z = “atomic number”
A = “mass number”
12
13
14
C
C
C
,
, and
are notations that represent isotopes of carbon.
6
6
6
3
1
2
,
and
H
are notations that represent isotopes of hydrogen.
H
H
1
1
1
The part of the atom where the protons and neutrons are is called the nucleus.
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