Science, asked by sneharai2009, 7 months ago

the electronic configuration of an element is 2,8,7.the element E belongs to which period (first, second, third, none)

Answers

Answered by mahipalhmahipalh98

0

Answer:

leayeaeaele

Explanation:

etdyelraeky

Answered by sky9792emailcom

0

Answer:

1s²,2s²,2p⁶,3s²,3p⁵

Explanation:

valency -1

period 2

group 17

block - p

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