Question

Fill in the blanks with appropriate words.

The principal quantum number n determines the __(i)__

And __(ii)__ of anorbital. With the increase in value of n, the numberofallowed __(iii)___ increases. Azimuthalquantum number defines the __(iv)__ of the orbital. The number of subshells in a principal shell is equal to the value __(v)__

(i) (ii) (iii) (iv) (v)

• A. Size energy orbitals shape n
• B. Size shape orbitals spin n – 1
• C. Size energy orbitals shape n- 1
• D. Shape spin orbitals number n

Answer 1

Answer: (A)

Size energy orbitals shape n

Answer 2

: The principal quantum number n determines the size and energy of an orbital. The number of orbitals increases with increase in value of n. since the value of l = n – 1 . e.g. when n = 1, l = 0 : when n = 2, l = 0, 1; when n = 3, l = 0, 1, 2 and so on. The number of subshell is equal to the values of n. azimuthal quantum number defines the shape or orientation ofj the orbitals.