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Question
Name or state following with reference to the element of the first three periods of the periodic table.
The valency of elements in group 1 [I–A].
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Solution
Valency of elements in group [I–A] is +1
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(a) Decreases
(b) Increases
(c) Remains the same
(d) Depends on the period
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(a) Depends on the number of valence electrons
(b) Remains the same
(c) Decreases
(d) Increases
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(a) Goes up and down
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(a) Decreases
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(a) Goes up and down
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Choose the most appropriate answer from the following list of oxides which fit the description.
An oxide which dissolves in water forming an acid.
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