10 Questions
How many chloride ions are present for each magnesium ion in magnesium chloride?
2
Which of the following is an example of a polyatomic ion?
Ammonium (NH4+)
In writing the chemical formula for an ionic compound, what is the correct order in which the symbols of cation and anion should be written?
Cation symbol first followed by anion symbol
What is the valency of potassium based on the information provided in Table 3.6?
1
In the compound calcium oxide, what is the ratio by mass of calcium to oxygen?
5:2
If a compound has a valency of 2 and combines with an ion having a valency of 1, what is the chemical formula of this compound according to the principles discussed in the text?
AB2
What is the main difference between a mixture and a compound?
A mixture shows the properties of the constituent substances, while a compound has new properties.
Why do elements react to form new compounds?
To achieve a stable electron configuration
When an element reacts with another element to form a compound, what is the significance of the valency?
Valency indicates the number of atoms of an element that can combine with one atom of another element
What is the role of ionic compounds in the formation of polyatomic ions?
Ionic compounds stabilize polyatomic ions
Test your knowledge on naming ions and polyatomic ions of nonmetallic elements, including hydrogen, ammonium, hydroxide, nitrate, magnesium, calcium, zinc, iron, copper, oxide, sulphide, carbonate, sulphite, sulphate, aluminium, iron(III), nitride, and phosphate.
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