Question

the atomic number of element is 18 write it electronic configration to which group and block it does belong to​

Answer 1

Answer:

The 18th element is Argon.

Its electronic configuration is 2,8,8.

It belongs to the third period and 18th group.

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Explanation:

Answer 2

Answer:

Given that, atomic number of an element is 18.

Therefore, electronic configuration is :-

• 1s2, 2s2, 2p6, 3s2, 3p6

Here, we can see that,

Last shell is 3p6.

Therefore, the period will be 3.

Now, since it's atomic number is 18.

Therefore, it belongs to Group 18.

Also, in K, L, M, N form it's electronic configuration will be :-

• 2, 8, 8

Group 18 is Noble Gas or Inert gas.

Noble gases have electronic configuration as np6.

Where, n is the number of periods.

The element is Argon.

The symbol of Argon is "Ar"

Group 18 comes in the p block of periodic table.

The Noble gases are the last group of periodic table.

They are Inert in nature.