There are a total of two shells in an atom. The number of electrons in the second shell is thrice the number of electrons in the first shell. Name the element.

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Solution

In the given atom, there are two K and L shells.
The first shell contains two electrons. The second shell contains $(2 \times 3) = 6$ electrons.
The atomic number of the Oxygen $(O)$ atom is eight. Thus, the Oxygen atom contains eight electrons.
The electronic configuration of the Oxygen atom is $2, 6$ .
Therefore, the name of the element is Oxygen.

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