Question

D. Complete the correlation: -- 2

1. K shell : 2 : : M shell : ______________.

2. Gas in gas : Air : :_________________ : Steel​

Answer 1

1) 18.

2) Solid.

Explanation:

1) K, L, M, N are the shells present in an atom. K = 1st shell, L = 2nd shell, M = 3rd shell, N = 4th shell. These are all shells are applicable for the 2n²

Here, K shell have only 2 electrons.

K = 1.

K = 2n² = 2(1)² = 2.

L shell have 8 electrons.

L = 2.

L = 2n² = 2(2)² = 2(4) = 8.

M shell have 18 electrons.

M = 3.

M = 2n² = 2(3)² = 2(9) = 18.

2) Air is in the Gaseous form. So, Air is Gas. Steel is in the Solid form. So, Steel is Solid.

Answer 2

The correct correlation of the following question is given below.

1. K shell: 2:: M shell: 18
2. Gas in gas: Air:: Solid in Solid: steel

• The orbit around the nucleus within which the electron rotates is called shells or Energy level. K is the first shell, L is the second shell, M is the third shell, N is the fourth shell. The number of electrons in each shell is 2n². Hence, for the K shell, there are 2 electrons. For the M shell, there are 18 electrons.
• The gas in gas is the colloids of gas with dispersed phase as gas and the dispersion medium is gas. So, the air is the colloidal example of gas in gas. So in the case of steel, the colloidal solution is solid in solid. In steel, both dispersed medium and dispersed phase is solid. So, the correlation will be solid in solid.