Question

5.find the group numbers and period numbers of element in which it's electronic
configuration ends in 3S2 3P5

Answer 1

Answer:

If you are given with the atomic number of an element you can find it's period number and group number. The period number is related to the number of electron occupied shells in the element and the period number is linked to its valence electrons.

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Answer 2

Answer:

group 17

period 3

Explanation:

3s²3p⁵ is configuration of chlorine

hence group 17 , period 3