Subshells Electronic Configuration

Q. Which subshell is at a higher energy level in multi electron species 4f or 5d?

Q. Which of the following represents the correct sequence of energy levels of the shells and sub shells?

1. 2s < 3p < 1s < 4d
2. 4p > 3p > 4s > 2s
3. 3d > 4s > 3p > 1s
4. 2p < 4d < 2f < 1s

Q.

The number of shells in the elements of $3^{rd}$ period of the modern periodic table is-

1. 1

2. 2

3. 3

4. 5

Q.

If an element is in 2nd group and 3rd period in the modern periodic table then it is most likely to be a

1. Metal

2. Non-metal

3. Metalloid

4. Noble gas

Q.

Which one of the following is correct in the case of increasing order of energy of an electron?

1. O, N, M, L, K
2. K, L, O, N, M
3. K, L, N, M, O
4. K , L, M, N, O

Q. The electronic configuration of four elements are given below. Which element does not belong to same family as others?

1. $\text{[Xe]}6s^{2}4f^{14}5d^{10}$
2. $\text{[Kr]}5s^{2}4d^{10}$
3. $\text{[Ar]}4s^{2}3d^{10}$
4. $\text{[Ne]}3s^{2}3p^5$

Q. How many shells in calcium atom are filled with electrons?

1. Two
2. Three
3. Five
4. Four

Q. Which of the given elements belong to the same period?

(i) A (Z = 2) (ii) B (Z = 3) (iii) C (Z = 6) (iv) D (Z = 10) (v) E (Z = 30).

Z is used to denote atomic number.

1. A, B, C
2. B, C, D
3. B, D, E
4. B, A, E