An element $X$ has electronic configuration $(2, 8, 8, 2)$ . Then $X$ is:

noble gas.

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metal.

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non-metal.

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metalloid.

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Solution

The correct option is D metal.
The element $X$ is calcium with atomic number 20 and electronic configuration (2,8,8,2). It has 2 valence electron.

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Similar questions

Element X has an electronic configuration of (2,8,2) and Element Y has an electronic configuration of (2,6).The compound formed by X and Y is covalent.

Q. The electronic configuration of calcium is

2, 8, 8, 2

. Find the valency of the element.

Q. The element

X

has the electronic configuration

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{10} 4 s^{2} 4 p^{5}

X

belongs to :

Q. Metal

A

has electronic configuration of 2,8,1 and metal

B

has 2,8,8,2 which is more reactive. The metal

A

is:

Q. The atom of an element has electronic configuration 2, 8, 8, 2.
(a) What is the atomic number of the element?
(b) To which of the following elements would it be chemically similar? (Atomic numbers of elements are given in brackets)
He (2); O (8); Mg (12); K (19)
Give reason for your choice.

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An element X has electronic configuration (2,8,8,2). Then X is:

The correct option is D metal.The element X is calcium with atomic number 20 and electronic configuration (2,8,8,2). It has 2 valence electron.

An element $X$ has electronic configuration $(2, 8, 8, 2)$ . Then $X$ is:

The correct option is D metal.
The element $X$ is calcium with atomic number 20 and electronic configuration (2,8,8,2). It has 2 valence electron.