Lesson Worksheet: Valence Science
In this worksheet, we will practice determining the valence of different elements.
Q1:
A nonmetal on the right-hand side of the periodic table has an electronic structure of . What is the valence of this element?
Q2:
Which of the following atomic groups, also known as polyatomic ions, has a valence of 2?
- ASulfate
- BPhosphate
- CNitrate
- DHydroxide
Q3:
Metals in group 2 commonly lose electrons when forming bonds in chemical reactions. Once beryllium has lost two electrons, how many electrons would be found in the outer shell?
Q4:
What is the valency of a metal with the electronic configuration 2, 8, 2?
Q5:
Chemicals with a positive or negative charge are known as ions. When these ions are made up of more than one atom, they are known as polyatomic ions.
What is the valency of the polyatomic hydroxide () ion?
Q6:
What is the valence of lithium, an element in group 1 of the periodic table?
Q7:
Halogens gain electrons when forming bonds with most metals. Once an atom of fluorine has reacted and formed a bond with a metal atom, how many electrons would have been gained?
Q8:
Atoms of iron can have a valence of either 2 or 3. What is the name given to compounds formed from iron atoms with a valence of 2?
- AMagnetic
- BFerric
- CRusty
- DSteel
- EFerrous
Q9:
Put the following 4 elements in order of increasing valency: zinc, silver, carbon, aluminum.
- AZinc, silver, aluminum, carbon
- BSilver, zinc, aluminum, carbon
- CAluminum, zinc, silver, carbon
- DSilver, zinc, carbon, aluminum
- ECarbon, aluminum, zinc, silver
Q10:
Although some elements are exceptions, there is a link between the group number of an element and its valency.
By looking at the following table, what is the value of X most likely to be?
| Group Number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|
| Valency | 1 | 2 | 3 | 4 | X | 2 | 1 | 0 |
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