Chemistry, asked by manishyadav2, 1 year ago

write the electronic configuration of atomic number 21

yogesh69: 1s²2s²2p6 3s² 3p6 3d¹ 4s²

PrashantS77: nope bro we have to follow the principle

yogesh69: yes that's right

PrashantS77: s orbitals have less energy and electrons than the big d orbitals so they get filled first

yogesh69: i know but after feeling the s orbital then fill d but after arrangement that's right

Answers

Answered by PrashantS77

An element with atomic no. 21 is scandium

You can find out the element if you remember it or can refer to the periodic table

Now the e config will be

1s2, 2s2, 3s2 3p6 4s2 3d1

or

2,8,8,3

Answered by siram

electronic configuration=1s2,2s2,2p6,3s2,3p6,4s2,3d1
another form=2,8,8,3

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