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3 cards from this section. Quick, good the night before a test.
What is the valency of an element with 1 valence electron?
Think about the definition of valency.
If an element has 8 electrons in its outer shell, what is its valency?
Consider the inert gases.
What is the valency of oxygen?
Remember the calculation rule for valency.
Valency is determined by the number of what?
Think about the outer shell of an atom.
How would knowing the valency of an element help in determining its chemical formula when forming compounds?
Consider how you would write the formula for water or carbon dioxide.
Predict the formula formed by combining Na (valency 1) and Cl (valency 1). Explain your reasoning.
Think about how many of each type of atom are needed for balance.
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