GENERAL KNOWLEDGE

GK

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The electron configuration of an atom is 1s22s22p6. The number of electrons in the atom is
A
3
B
6
C
8
D
10
Explanation: 

Detailed explanation-1: -1s2 2s2 2p6. The number of electrons in the atom is 10.

Detailed explanation-2: -1s2 2s2 2p6 is the electronic configuration of neon. Neon is the second member of the group of elements called the noble gases. They have 8 electrons in the outermost shells of their atoms.

Detailed explanation-3: -Explanation: The supercripts (2, 2, 6, 2 and 2) are the number of electrons in each orbital. Simply add up these numbers, which will give you 14. Now just look for the element on the periodic table with the atomic number of 14.

Detailed explanation-4: -Thus, the electron configuration for a P5+ ion is 1s22s22p6.

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