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WorksheetsElectrons and forming Ionic Compounds-Final
Total questions: 12
Worksheet time: 15mins
Name
Class
Date
1.
How many outer (valence) electrons are in an atom of Se?
a)
2
b)
8
c)
6
d)
5
2.
How many outer (valence) electrons are in an atom of Ar?
a)
2
b)
8
c)
4
d)
1
3.
How many outer (valence) electrons are in an atom of K?
a)
3
b)
8
c)
4
d)
1
4.
How many outer (valence) electrons are found in atoms of group 1?
a)
7
b)
6
c)
4
d)
1
5.
How many valence (outer) electrons does an Oxygen atom have?
a)
2
b)
6
c)
8
d)
16
6.
What is the atomic number of this element?
a)
17
b)
18
c)
35
d)
35.453
7.
How many electrons does an atom with 8 protons have?
a)
8
b)
16
c)
15.99
d)
24
8.
What group does this element belong to?
a)
Group 1: Alkali metals
b)
Group 18: Noble Gases
c)
Group 2: Alkaline-Earth Metals
d)
Group 17: Halogens
9.
What is the 0xidation number (charge) on an Aluminum ion?
a)
3
b)
+3
c)
+2
d)
+1
10.
Fe +3 and S -2
a)
Fe3S2
b)
FeS
c)
S3Fe2
d)
Fe2S3
11.
In the chemical formula for an ionic compound, which item is written first?
a)
positive ion
b)
negative ion
c)
subscript
d)
the female
12.
How many outer (valence) electrons does calcium have?
a)
2
b)
4
c)
6
d)
7
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