Three elements a, b and c have atomic number 7, 8 and 9 respectively.
a.What would be their positions in the modern periodic table?
b.Arrange a, b and c in the decreasing order of their size.
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6
a. position of a is 15 group and 2 period.
position of b is 16 Group and 2period
position of b is 16 Group and 2period
vishuSinghk2:
position of c is 17 group and 2 period
b. decreasing order=c>b>q
c>b>a
Answered by
8
Answer: a) Group no. of A b and c are 15 16 and 17 respectively and all belong to 2nd period
b) A>B>C as atomic size decreases from left to right
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