Lanthanides Electronic Configuration

Q.

What is the general electronic configuration of alkaline earth metals?

Q.

The electronic configuration of silicon is ______and that of sulfur is ______.

Q.

Explain physical properties and oxidation states of $d$ block elements?

Q.

What is the general outermost shell electronic configuration for Lanthanoids?

Q. Which of the following represents the electronic configuration of a transition element

1. $1s^2,2s^2{p}^6......n{s}^2{p}^3$
2. $1s^2,2s^2{p}^6......n{s}^2{p}^3,(n+1)s^2$
3. $1s^2,2s^2{p}^6......n{s}^2{p}^6{d}^{10},(n+1)s^2{p}^1$
4. $1s^2,2s^2{p}^6......n{s}^2{p}^6$

Q. Gadolinium (Gd) has a $4f^{7}5d^{1}6s^2$ electronic configuration outside the [Xe] core. Find the spin only magnetic moment of $G{d}^{3+}$.

1. $\sqrt{63}B.M$
2. $\sqrt{35}B.M$
3. $\sqrt{48}B.M$
4. $\sqrt{24}B.M$

Q. Assertion: $C{e}^{4+}$ is used as an oxidizing agent in volumetric analysis.
Reason: $C{e}^{4+}$ has a tendency to attain its $+3$ oxidation state.

1. Both (A) and (R) are correct and (R) is the correct explanation of (A)
2. Both (A) and (R) are correct and (R) is not the correct explanation of (A)
3. (A) is correct, but (R) is incorrect
4. (A) is incorrect , but (R) is correct

Q. The valence shell electronic configuration of $C{r}^{2+}$ ion is

1. $4s^{0}3d^4$
2. $4s^{2}3d^2$
3. $4s^{2}3d^0$
4. $3p^{6}4s^2$

Q. The valence shell electronic configuration of $C{r}^{2+}$ ion is

1. $4s^{0}3d^4$
2. $4s^{2}3d^2$
3. $4s^{2}3d^0$
4. $3p^{6}4s^2$

Q. Assertion: Separation of Zr and Hf is difficult.
Reason: Because Zr and Hf lie in the same group of the periodic table.

1. Both assertion and reason are true, and reason is the correct explanation of the assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is not true but reason is true.
4. Both assertion and reason are false.

Q. The electronic configuration of Ag atom is

1. $\left[Kr\right]4d^{10}4s^1$
2. $\left[Xe\right]4f^{14}{d}^{10}6s^1$
3. $\left[Kr\right]4d^{10}5s^1$
4. $\left[Kr\right]4d^{9}5s^2$

Q. Assertion: $C{e}^{4+}$ is used as an oxidizing agent in volumetric analysis.
Reason: $C{e}^{4+}$ has a tendency to attain its $+3$ oxidation state.

1. Both (A) and (R) are correct and (R) is the correct explanation of (A)
2. Both (A) and (R) are correct and (R) is not the correct explanation of (A)
3. (A) is correct, but (R) is incorrect
4. (A) is incorrect , but (R) is correct

Q. Assertion: Separation of Zr and Hf is difficult.
Reason: Because Zr and Hf lie in the same group of the periodic table.

1. Both assertion and reason are true, and reason is the correct explanation of the assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. Assertion is not true but reason is true.
4. Both assertion and reason are false.

Q. The outer electronic configuration of Gd (Atomic No: 64) is:

1. $4f^{8}5d^{0}6s^2$.
2. $4f^{4}5d^{4}6s^2$.
3. $4f^{7}5d^{1}6s^2$.
4. $4f^{3}5d^{5}6s^2$.