Questions

complete the Graph/Table.

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7 questions · self-marked practice — reveal the answer and mark yourself.

Question 13 Marks
Complete the table:
Isotopes Proton number Neutron number
11H
21H
3517Cl
3517Cl
3717Cl
Answer
IsotopesProton numberNeutron number
11H1
21H11
3517Cl12
3517Cl1718
3717Cl1720
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Question 23 Marks
When the number of the valence electrons in an element ‘x’ is 4 or more than 4, does’(8 – x)’ match with the valency of that element? How many electrons are used to complete the octet?
Answer
When the number of the valence electrons in an element x is 4 or more than 4, then (8-x) matches with the valency of that element. (8-x) electrons are used to complete the octet.
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Question 33 Marks
In table 4 column you have written of that element? How many electrons identified valency from its molecular are used to complete the octet? formulae. When the number of the valency electrons in an element ‘x’ is 4 or less than 4, does ‘x’ match with the valency of that element?
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Answer
When the number of the valence electrons in an element x is 4 or less than 4, then x matches with the valency of that element.
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complete the Graph/Table. - Science STD 8 Questions - Vidyadip