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2 cards from this section. Quick, good the night before a test.
What is the valency of oxygen?
Think of how many electrons oxygen needs to fill its outer shell.
Which element has a valency of 1?
This element is the first in the periodic table.
What is the valency of nitrogen?
Think about how many bonds nitrogen can form.
True or False: The valency of chlorine is 2.
Consider chlorine's position in the periodic table.
Explain why the formula for calcium chloride is CaCl₂.
Think about how many of each atom you need to balance the charges.
Write the chemical formula for the compound formed between iron (III) and sulfate ions.
Apply the criss-cross method carefully considering the charges.
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