Classification of Elements and Periodicity in Properties
89552
Gadolinium has a low value of third ionisation enthalpy because of
1 high basic character
2 small size
3 high exchange enthalpy
4 high electro negativity
Explanation:
Gadolinium has a low value of third ionization enthalpy because of high exchange enthalpy. In case of third ionization enthalpy electron will be removed from $5 \mathrm{~d}$ and resulting configuration will be more stable electronic configuration.
NEET-17.07.2022
Classification of Elements and Periodicity in Properties
89569
Which element has the highest first ionization potential?
1 $\mathrm{N}$
2 $\mathrm{Ne}$
3 $\mathrm{He}$
4 $\mathrm{H}$
5 $\mathrm{Li}$
Explanation:
On moving from up to down in a group ionization potential decrease and across a period ionisation energy increase. $\mathrm{He}$ is small size and fully filled inert gas configuration. Therefore, $\mathrm{He}$ has the highest first ionization potential.
Manipal-2020
Classification of Elements and Periodicity in Properties
89570
With which of the following electronic configuration an atom has the lowest ionisation enthalpy?
The given electronic configuration has $1 \mathrm{~s}^2 2 \mathrm{~s}^2$ $2 \mathrm{p}^6 3 \mathrm{~s}^1$. On removing the one electron easily due to form stable noble gas configuration. Hence, the electronic configuration $1 \mathrm{~s}^2, 2 \mathrm{~s}^2, 2 \mathrm{p}^6, 3 \mathrm{~s}^1$ has lowest ionisation enthalpy.
WB JEE-2011
Classification of Elements and Periodicity in Properties
89685
The order of decreases in atomic radii for $B e$, $\mathrm{Na}$, and $\mathrm{Mg}$ is
1 $\mathrm{Na}>\mathrm{Mg}>\mathrm{Be}$
2 $\mathrm{Mg}>\mathrm{Na}>\mathrm{Be}$
3 $\mathrm{Be}>\mathrm{Na}>\mathrm{Mg}$
4 $\mathrm{Be}>\mathrm{Mg}>\mathrm{Na}$
Explanation:
Ionization potential decrease on moving down the group hence fluorine has highest ionisation potential.
Classification of Elements and Periodicity in Properties
89552
Gadolinium has a low value of third ionisation enthalpy because of
1 high basic character
2 small size
3 high exchange enthalpy
4 high electro negativity
Explanation:
Gadolinium has a low value of third ionization enthalpy because of high exchange enthalpy. In case of third ionization enthalpy electron will be removed from $5 \mathrm{~d}$ and resulting configuration will be more stable electronic configuration.
NEET-17.07.2022
Classification of Elements and Periodicity in Properties
89569
Which element has the highest first ionization potential?
1 $\mathrm{N}$
2 $\mathrm{Ne}$
3 $\mathrm{He}$
4 $\mathrm{H}$
5 $\mathrm{Li}$
Explanation:
On moving from up to down in a group ionization potential decrease and across a period ionisation energy increase. $\mathrm{He}$ is small size and fully filled inert gas configuration. Therefore, $\mathrm{He}$ has the highest first ionization potential.
Manipal-2020
Classification of Elements and Periodicity in Properties
89570
With which of the following electronic configuration an atom has the lowest ionisation enthalpy?
The given electronic configuration has $1 \mathrm{~s}^2 2 \mathrm{~s}^2$ $2 \mathrm{p}^6 3 \mathrm{~s}^1$. On removing the one electron easily due to form stable noble gas configuration. Hence, the electronic configuration $1 \mathrm{~s}^2, 2 \mathrm{~s}^2, 2 \mathrm{p}^6, 3 \mathrm{~s}^1$ has lowest ionisation enthalpy.
WB JEE-2011
Classification of Elements and Periodicity in Properties
89685
The order of decreases in atomic radii for $B e$, $\mathrm{Na}$, and $\mathrm{Mg}$ is
1 $\mathrm{Na}>\mathrm{Mg}>\mathrm{Be}$
2 $\mathrm{Mg}>\mathrm{Na}>\mathrm{Be}$
3 $\mathrm{Be}>\mathrm{Na}>\mathrm{Mg}$
4 $\mathrm{Be}>\mathrm{Mg}>\mathrm{Na}$
Explanation:
Ionization potential decrease on moving down the group hence fluorine has highest ionisation potential.
Classification of Elements and Periodicity in Properties
89552
Gadolinium has a low value of third ionisation enthalpy because of
1 high basic character
2 small size
3 high exchange enthalpy
4 high electro negativity
Explanation:
Gadolinium has a low value of third ionization enthalpy because of high exchange enthalpy. In case of third ionization enthalpy electron will be removed from $5 \mathrm{~d}$ and resulting configuration will be more stable electronic configuration.
NEET-17.07.2022
Classification of Elements and Periodicity in Properties
89569
Which element has the highest first ionization potential?
1 $\mathrm{N}$
2 $\mathrm{Ne}$
3 $\mathrm{He}$
4 $\mathrm{H}$
5 $\mathrm{Li}$
Explanation:
On moving from up to down in a group ionization potential decrease and across a period ionisation energy increase. $\mathrm{He}$ is small size and fully filled inert gas configuration. Therefore, $\mathrm{He}$ has the highest first ionization potential.
Manipal-2020
Classification of Elements and Periodicity in Properties
89570
With which of the following electronic configuration an atom has the lowest ionisation enthalpy?
The given electronic configuration has $1 \mathrm{~s}^2 2 \mathrm{~s}^2$ $2 \mathrm{p}^6 3 \mathrm{~s}^1$. On removing the one electron easily due to form stable noble gas configuration. Hence, the electronic configuration $1 \mathrm{~s}^2, 2 \mathrm{~s}^2, 2 \mathrm{p}^6, 3 \mathrm{~s}^1$ has lowest ionisation enthalpy.
WB JEE-2011
Classification of Elements and Periodicity in Properties
89685
The order of decreases in atomic radii for $B e$, $\mathrm{Na}$, and $\mathrm{Mg}$ is
1 $\mathrm{Na}>\mathrm{Mg}>\mathrm{Be}$
2 $\mathrm{Mg}>\mathrm{Na}>\mathrm{Be}$
3 $\mathrm{Be}>\mathrm{Na}>\mathrm{Mg}$
4 $\mathrm{Be}>\mathrm{Mg}>\mathrm{Na}$
Explanation:
Ionization potential decrease on moving down the group hence fluorine has highest ionisation potential.
Classification of Elements and Periodicity in Properties
89552
Gadolinium has a low value of third ionisation enthalpy because of
1 high basic character
2 small size
3 high exchange enthalpy
4 high electro negativity
Explanation:
Gadolinium has a low value of third ionization enthalpy because of high exchange enthalpy. In case of third ionization enthalpy electron will be removed from $5 \mathrm{~d}$ and resulting configuration will be more stable electronic configuration.
NEET-17.07.2022
Classification of Elements and Periodicity in Properties
89569
Which element has the highest first ionization potential?
1 $\mathrm{N}$
2 $\mathrm{Ne}$
3 $\mathrm{He}$
4 $\mathrm{H}$
5 $\mathrm{Li}$
Explanation:
On moving from up to down in a group ionization potential decrease and across a period ionisation energy increase. $\mathrm{He}$ is small size and fully filled inert gas configuration. Therefore, $\mathrm{He}$ has the highest first ionization potential.
Manipal-2020
Classification of Elements and Periodicity in Properties
89570
With which of the following electronic configuration an atom has the lowest ionisation enthalpy?
The given electronic configuration has $1 \mathrm{~s}^2 2 \mathrm{~s}^2$ $2 \mathrm{p}^6 3 \mathrm{~s}^1$. On removing the one electron easily due to form stable noble gas configuration. Hence, the electronic configuration $1 \mathrm{~s}^2, 2 \mathrm{~s}^2, 2 \mathrm{p}^6, 3 \mathrm{~s}^1$ has lowest ionisation enthalpy.
WB JEE-2011
Classification of Elements and Periodicity in Properties
89685
The order of decreases in atomic radii for $B e$, $\mathrm{Na}$, and $\mathrm{Mg}$ is
1 $\mathrm{Na}>\mathrm{Mg}>\mathrm{Be}$
2 $\mathrm{Mg}>\mathrm{Na}>\mathrm{Be}$
3 $\mathrm{Be}>\mathrm{Na}>\mathrm{Mg}$
4 $\mathrm{Be}>\mathrm{Mg}>\mathrm{Na}$
Explanation:
Ionization potential decrease on moving down the group hence fluorine has highest ionisation potential.
