Question

List the subshells that hold the 25 electrons in a
manganese atom in order of increasing energy

Answer 1

Answer:

1s2 2s2 2p6 3s2 3p6 4s2 3d5

Explanation:

According to the Aufbau principle, electrons are filled in orbitals in order of increasing energy. The energy of orbitals in the electronic configuration of manganese increases from left to right, hence 3d orbital is much greater in energy than a 3p orbital.

The arrangement of orbitals in order of increasing energy is shown in the answer above.

Answer 2

Using the s, p, d, f electronic configuration notation, the arrangement of the 25 electrons which makes up a manganese atom arranged in order of increasing energy is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{5}$

The electronic configuration of manganese can be written thus :

Number of electron = 25 electrons

The s - orbital can take a maximum of two electrons

The p - orbital can take a maximum of 6 electrons

The d - orbital can take up to a maximum of 10 electrons

The allocation of electrons is as follows :

• 1s = 2 electrons
• 2s = 2 electrons
• 2p = 6 electrons
• 3s = 2 electrons
• 3p = 6 electrons
• 4s = 2 electrons
• 3d = 5 electrons

Therefore, the arrangement of Manganeses' 25 electrons in order of increasing energy is ; $Mn: 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{5}$

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