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Q.

The elements with atomic number 117 and 120 are yet to be discovered. In which group would you place these elements when discovered?

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a

17, 2

b

16, 4

c

15, 3

d

18, 2

answer is A.

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Detailed Solution

The element with atomic number 117 is placed in 17th group. The element with atomic number 120 is placed in 2nd group.
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