Question

Which of the following set of atomic numbers
represents only transition elements?
(1) 19, 23, 47
(2) 21, 28, 48
18) 47, 72, 79 (4) 30, 48, 80​

Answer 1

Answer:

I think 4 Number is the answer

Answer 2

Answer:

(2) 21, 28, 48

Explanation:

Elements of d-block (Z=21-30, 39-48, fifty seven and 72-80, 89 and 104-112) are referred to as transition factors even as the ones of t-block (with Z=58-seventy one and Z=90-103) are referred to as internal transition factors.  

The first principal transition collection starts offevolved with both scandium (image Sc, atomic variety 21) or titanium (image Ti, atomic variety 22) and ends with zinc (image Zn, atomic variety 30). The 2nd collection consists of the factors yttrium (image Y, atomic variety 39) to cadmium (image Cd, atomic variety 48).

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