Question

Atomic number of copper is 29. The number of electrons in the d sub shell and last sub shell are ...... & ...... respectively.

Answer 1

Answer:

10 and 1 respectively

Explanation:

In general, Copper should have EC(electronic configuration) as 1s2 2s2 2p6 3s2 3p6 4s2 3d9

But, the difference between the energy levels of 4s and 3d orbital are very less.

So, one electron jumps from 4s to 3d to gain more stability and its EC becomes 1s2 2s2 2p6 3s2 3p6 4s1 3d10.

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Answer 2

Answer:

8 and 5 atoms

Explanation:

According to neils Bohr the electronic configuration is 2,8,8,5