Question

the atomic number of an element is 40 write its subshell electrons configurations​

Answer 1

Answer:

Molybdenum is the element with atomic number 42 and is having electronic configuration [Kr]5s14d5, where atomic no. of Kr = 36. Thus no. of valence electrons is 1, which is no of an electron in 5s subshell.

Explanation:

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Answer 2

Answer:

Answer is this

Explanation:

40

Zr

[kr] 5s³ 4d¹