SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How many electrons should Beryllium have around its Lewis dot model?
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1
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2
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3
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4
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Explanation:
Detailed explanation-1: -Lone pairs on the outer rims of an atom are represented as two dots. The electrons represented in a lewis stucture are the outer-shell electrons, which are called valence electrons. This is because they are the ones involved in chemical reactions.
Detailed explanation-2: -(In Lewis structures, a line represents two electrons.) Atoms tend to form covalent bonds in such a way as to satisfy the octet rule, with every atom surrounded by eight electrons.
Detailed explanation-3: -The helium atom(E.C =1s2) has 2 electrons in its valence shell but its valency is zero as it is a noble gas and does not form a chemical bond, its duplet is complete.
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