Question

the atomic number of elements x is 29 how many electron are present in penultimate shell​

Answer 1

HEYA,

THERE ARE 8 ELECTRONS IN IT'S PENULTIMATE SHEL.

FACT:

• PENULTIMATE SHELL IS THE SHELL BEFORE THE VALENCE SHELL.

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Answer 2

there are 9 electrons in the penultimate shell of element with atomic number 29

EC of X= 1s2 2s2 2p6 3s2 3p6 4s2 3d9