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Question
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
What is its valency?
One Line Answer
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Solution 1
It needs to lose its 2 valence electrons to complete its octet configuration; therefore its valency is also 2.
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Solution 2
Valency is +2
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Chapter 1: Periodic Table, Periodic Properties and Variations of Properties - lntext Questions [Page 11]
