Build an Atom Webquest: Answer Key
(#4-9 – 0.5 points each; #14 – 1 point)
4) a. Hydrogen
b. Stable
5) It is still Hydrogen.
6) A negative ion is made because now there are more electrons than protons.
8) It is unstable.
9) To make it stable, you have to add a proton.
14) Only the atomic mass (the number on the top left) increased by 1. The other
number stayed the same.
15) (1 point total for each row)
#
Proton
s
#
Neutron
s
#
Electron
s
Element Name
Stable/Unstable
Charge
6
6
4
Carbon
Stable
Positive (+2)
3
2
3
Lithium
Unstable
Neutral
7
5
7
Nitrogen
Unstable
Neutral
1
1
1
Hydrogen
Stable
Neutral
2
2
2
Helium
Stable
Neutral
4
2
2
Beryllium
Unstable
Positive (+2)
9
4
6
Fluorine
Unstable
Positive (+3)
1
2
2
Hydrogen
Unstable
Negative (-1)
5
5
5
Boron
Stable
Neutral
7
7
6
Nitrogen
Stable
Positive (+1)
10
13
10
Neon
Unstable
Neutral
