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4 April, 10:36

The number of electrons that fills a certain principle energy level equals ...

a-n

d-n²

b - 2n

c - 2n²

+4
Answers (1)
  1. 4 April, 11:02
    0
    option c = 2n²

    Explanation:

    Principle energy levels are represented by n. The number of orbital per energy level are determine through n². While the number of electrons in per energy level are determine through 2n².

    For example:

    Principle energy level n number of orbitals n² number of electrons 2n².

    1 1² = 1 2 (1) ² = 2

    2 2² = 4 2 (2) ² = 8

    3 3² = 9 2 (3) ² = 18

    while the number of electrons in subshell can be determine through Aufbau principal. We know that there four subshells s, p, d and f. The maximum number of electrons in these subshells can be calculated by following formula:

    2 (2l + 1)

    and l = 0,1,2,3, ...

    maximum numbers of electrons in s subshell are,

    l=0

    2 (2 (0) + 1)

    2

    so maximum electrons in s subshell are 2.

    maximum numbers of electrons in p subshell are,

    l = 1

    2 (2 (1) + 1)

    2 (2 + 1

    6

    so maximum electrons in p subshell are 6.

    maximum numbers of electrons in d subshell are,

    l = 2

    2 (2 (2) + 1)

    2 (4 + 1)

    10

    so maximum electrons in d subshell are 10.

    maximum numbers of electrons in f subshell are,

    l = 3

    2 (2 (3) + 1)

    2 (6 + 1)

    14

    so maximum electrons in f subshell are 14.
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