What is the maximum number of electrons in each of the first three energy levels for the first 20 elements?

Answer 1

The number of electrons that can fit into a particular energy level is 2n^2 (2 times n squared) where the energy level is n.

So, for:

energy level 1 we have 2 x (1x1) = 2,

for energy level 2 we have 2 x (2x2) = 8,

for energy level 3 we have 2 x (3x3) = 18.

So, 2+8+18= 28 max. electrons in the first 3 energy levels.

Answer 2

The formula is 2n^2 (2 times n squared) where n=the energy level.

So:

Level 1 = 2 x (1x1) = 2

Level 2 = 2 x (2x2) = 8

Level 3 = 2 x (3x3) = 18

This defines the maximum number in those shells, not how many are in each shell for a particular element. For that you need to look at an electron configuration table for that element.

See the links provided in 'related links' for a more complete answer to this question.

Answer 3

1st shell - 2 electrons

2nd shell - 8 electrons

3rd shell - 8 electrons

4th shell - 2 electrons

It stops following that pattern for larger elements which I'm assuming is why you've only been asked to know the first 20.

Answer 4

2 electrons in the first orbit of an atom, 8 in the second orbit and 8 in the third. The forth is just the remainder of electrons.

Answer 5

28 electrons can be accomadated in first 3 orbitals

Answer 6

The number of electrons for each orbit are: 2 for first orbit, 8 for second orbit, and 8 for third orbit.

Answer 7

1st orbit: 2 electrons

2nd orbit: 8 electrons

3rd orbit: 8 electrons

Answer 8

metals