Electronic Configuration of Actinides

Q.

Write the general electronic configuration of $\mathrm{s},\mathrm{p},\mathrm{d}\mathrm{and}\mathrm{f}$ block elements

Q.

Which of the first 20 elements in the periodic table are metal and which are non-metals?

Q.

Which of the following ins not an actionid?
(a) Curium (Z= 96)
(b) Californium (Z= 98)
(c) Uranium (Z = 92)
(d) Terbium (Z = 65)

Q. Which of the following trivalent ion has the largest ionic radii in the lanthanide series?

1. La
2. Ce
3. Pm
4. Lu

Q. Assertion: The ${19}^{th}$ electron in potassium atom enters into the $4s$ orbital and not into the $3d$ orbital.
Reason: $(n+l)$ rule is followed for determining the orbitals of the lowest energy state.

1. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion
2. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion
3. If Assertion is true but the Reason is false
4. If both Assertion and Reason is false

Q.

Why has it been difficult to study the chemistry of radon?

Q.

Which molecule/ion out of the following does not contain unpaired electrons?

1. $O_2^{2-}$
2. $O_2$
3. $N_2^{+}$
4. $B_2$

Q. The correct order of energies of d-orbitals of metal ions in a square planar complex is :

1. $d_{xy}=d_{yz}=d_{zx}>d_{x^2-y^2}=d_{x^2}$
2. $d_{x^2-y^2}=d_{z^2}>d_{xy}=d_{yz}=d_{zx}$
3. $d_{x^2-y^2}>d_{z^2}>d_{xy}=d_{yz}=d_{zx}$
4. $d_{x^2-y^2}>d_{xy}>d_{z^2}>d_{zx}=d_{yz}$

Q.

Which is more ionic $\mathrm{LiF}\mathrm{and}\mathrm{CsF}$?

Q. Which of the following will exhibit colour in aqueous solution ?

1. $L{a}^{3+}(Z=57)$
2. $T{i}^{3+}(Z=22)$
3. $L{u}^{3+}(Z=71)$
4. $S{c}^{3+}(Z=21)$

Q.

What is the name given to element with same mass number and different atomic number?

Q.

Give the formula and describe the structure of a noble gas species which is isostructural with:

(i)

(ii)

(iii)

Q. The electronic configuration of actinides cannot be assigned with a degree of certainty because of:

1. The small energy difference between $5f$ and $6d$ orbitals
2. Overlapping of inner orbitals
3. None of above
4. Free movement of electrons over all the orbitals

Q. Atomic numbers of actinides are from

1. 57 to 71
2. 80 to 103
3. 58 to 71
4. 90 to 103

Q. why oxides of transition elements are more stable than fluorides?

Q. Which is the correct order of increasing energy of the listed orbitals in the atom of titanium?
(Atomic no. Z=22)

1. $3s<3p<3d<4s$
2. $3s<3p<4s<3d$
3. $3s<4s<3p<3d$
4. $4s<3s<3p<3d$

Q.

Question 22

Amongst the following elements whose electronic configuration are given below, the one having the highest ionisation enthaply is

(a)$\left[Ne\right]3s^{2}3p^1$

(b) $\left[Ne\right]3s^{2}3p^3$

(c) $\left[Ne\right]3s^{2}3p^2$

(d) $\left[Ar\right]3d^{10}4s^{2}4p^3$

Q. Consider the following statements.
(I) Element with atomic number $43$ belongs to $d-$block.
(II) ${}_{64}Gd$ is present in group $3$.
(III) Se has two unpaired electrons in p-subshell.
The correct statement(s) is/are

1. Only (III)
2. Only (I) and (II)
3. Only (I) and (III)
4. (I), (II) and (III)

Q. ${\left[\text{Ru}\right({\text{NH}}_3{)}_6]}^{3+}$ is an octahedral, ${\text{d}}^5$ low-spin complex, how many unpaired electrons does this complex have?

1. $5$
2. $1$
3. $4$
4. $3$

Q.

The electronic configuration of a dispositive metal $M^{2+}$ is, 2, 8, 14 and its atomic weight is 56 a.m.u. The number of neutrons in its nuclei would be

1. 30

2. 32

3. 34

4. 42

Q. The first five ionization energies of an element are 9.1, 16.2, 24.5, 35 and 205.7 eV respectively. The number of valence electrons in the atom is

1. 2
2. 3
3. 4
4. 5

Q.

What is the general outermost shell electronic configuration for Actinoids?

Q.

Define ionisation enthalpy. Discuss the factors affecting ionisation enthalpy of the elements and its trends in the periodic table.

Q. ________ is a radioactive inert gas.

Q. In the general electronic configuration,
$(n-2)f^{1-14}(n-1)d^{01}n{s}^2$ (where n = 7) the configuration will be of:

1. lanthenides
2. actinides
3. transition elements
4. none

Q. Correct the mistakes, if any in the following statement.
i) Second period is a short period. It contains only two elements.
ii) Group $18$ elements are called Halogen family.

Q. The electronic configuration of actinides cannot be assigned with a degree of certainty because of:

1. The small energy difference between $5f$ and $6d$ orbitals
2. Overlapping of inner orbitals
3. Free movement of electrons over all the orbitals
4. None of above

Q. Which of the following electronic configuration represents argon

1. 
2. 
3. 
4. 

Q. In the following electronic configuration $n{s}^2(n-1)d^{0-1}(n-2)f^{1-14}$. If value of $(n-1)=6$ the configuration will be of:

1. lanthanides
2. d - block
3. actinides
4. s - block

Q. Stable electronic configuration of a transition metal is:

1. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{9}4s^2$
2. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^5$
3. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^2$
4. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^6$