Question

The correct representation of element (X) whose tri-positive ion contains 21 electrons & 28 neutrons is​

Answer 1

Answer:

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Explanation:

HAPPY FRIENDSHIP DAY TO YOU ALL FRIENDS

THE CORRECT ANSWER IS:-Ar or Copper

I am thinking

Answer 2

Explanation:

• This is how you represent any ₃ X ³
• So Scandium is Sc ( 21=Z below and A= mass 21+28 upper end) as given above .