02. Atomic and Ionic Radii
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Classification of Elements and Periodicity in Properties

89423 The ions $\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+}, \mathrm{Mg}^{2+}$ and $\mathrm{Al}^{3+}$ are isoelectronic. Their ionic radii show :

1 $\mathrm{A}$ decrease from $\mathrm{O}^{2-}$ to $\mathrm{F}^{-}$and then increase from $\mathrm{Na}^{+}$to $\mathrm{Al}^{3+}$
2 A significant increase from $\mathrm{O}^{2-}$ to $\mathrm{Al}^{3+}$
3 A significant decrease from $\mathrm{O}^{2-}$ to $\mathrm{Al}^{3+}$
4 An increase from $\mathrm{O}^{2-}$ to $\mathrm{F}^{-}$and then decrease from $\mathrm{Na}^{+}$to $\mathrm{Al}^{3+}$
BITSAT 2013
Classification of Elements and Periodicity in Properties

89426 Which among the following property increases, as we move down group-I of the periodic table?

1 Electronegativity
2 Ionic radius
3 Melting point
4 Ionization enthalpy
Shift-II
Classification of Elements and Periodicity in Properties

89431 The ions $\mathrm{S}^{2-}, \mathrm{C} \tau, \mathrm{K}^{+}, \mathrm{Ca}^{2+}$ are iso-electronic. Their ionic radii show

1 A decrease from $\mathrm{S}^{2-}$ to $\mathrm{Cl}$ and then increase from $\mathrm{K}^{+}$to $\mathrm{Ca}^{2+}$
2 An increase from $\mathrm{S}^{2-}$ to $\mathrm{Cl}$ and then decrease from $\mathrm{K}^{+}$to $\mathrm{Ca}^{2+}$
3 A significant decrease from $\mathrm{S}^{2-}$ to $\mathrm{Ca}^{2+}$
4 A significant increase from $\mathrm{S}^{2-}$ to $\mathrm{Ca}^{2+}$
AP EAPCET 23-08-2021 Shift-I
Classification of Elements and Periodicity in Properties

89432 The ionic radii of $\mathrm{F}^{-}$and $\mathrm{O}^{2-}$ respectively are $1.33 \AA$ and $1.4 \AA$ while the covalent radius of $\mathrm{N}$ is $0.74 \AA$. The correct statement for the ionic radius of $\mathrm{N}^{3-}$ from the following is

1 it is smaller than $\mathrm{F}^{-}$and $\mathrm{N}$
2 it is bigger than $\mathrm{O}^{2-}$ and $\mathrm{F}^{-}$
3 it is bigger than $\mathrm{F}^{-}$and $\mathrm{N}$, but smaller than of $\mathrm{O}^{2-}$
4 it is smaller than $\mathrm{O}^{2-}$ and $\mathrm{F}^{-}$, but bigger than of $\mathrm{N}$
(JEE Main 2021
Classification of Elements and Periodicity in Properties

89434 In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is

1 electronegativity
2 electron gain enthalpy
3 ionisation enthalpy
4 atomic radius
(JEE Main 2020
NEET DIGITAL LIBRARY
Classification of Elements and Periodicity in Properties

89423 The ions $\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+}, \mathrm{Mg}^{2+}$ and $\mathrm{Al}^{3+}$ are isoelectronic. Their ionic radii show :

1 $\mathrm{A}$ decrease from $\mathrm{O}^{2-}$ to $\mathrm{F}^{-}$and then increase from $\mathrm{Na}^{+}$to $\mathrm{Al}^{3+}$
2 A significant increase from $\mathrm{O}^{2-}$ to $\mathrm{Al}^{3+}$
3 A significant decrease from $\mathrm{O}^{2-}$ to $\mathrm{Al}^{3+}$
4 An increase from $\mathrm{O}^{2-}$ to $\mathrm{F}^{-}$and then decrease from $\mathrm{Na}^{+}$to $\mathrm{Al}^{3+}$
BITSAT 2013
Classification of Elements and Periodicity in Properties

89426 Which among the following property increases, as we move down group-I of the periodic table?

1 Electronegativity
2 Ionic radius
3 Melting point
4 Ionization enthalpy
Shift-II
Classification of Elements and Periodicity in Properties

89431 The ions $\mathrm{S}^{2-}, \mathrm{C} \tau, \mathrm{K}^{+}, \mathrm{Ca}^{2+}$ are iso-electronic. Their ionic radii show

1 A decrease from $\mathrm{S}^{2-}$ to $\mathrm{Cl}$ and then increase from $\mathrm{K}^{+}$to $\mathrm{Ca}^{2+}$
2 An increase from $\mathrm{S}^{2-}$ to $\mathrm{Cl}$ and then decrease from $\mathrm{K}^{+}$to $\mathrm{Ca}^{2+}$
3 A significant decrease from $\mathrm{S}^{2-}$ to $\mathrm{Ca}^{2+}$
4 A significant increase from $\mathrm{S}^{2-}$ to $\mathrm{Ca}^{2+}$
AP EAPCET 23-08-2021 Shift-I
Classification of Elements and Periodicity in Properties

89432 The ionic radii of $\mathrm{F}^{-}$and $\mathrm{O}^{2-}$ respectively are $1.33 \AA$ and $1.4 \AA$ while the covalent radius of $\mathrm{N}$ is $0.74 \AA$. The correct statement for the ionic radius of $\mathrm{N}^{3-}$ from the following is

1 it is smaller than $\mathrm{F}^{-}$and $\mathrm{N}$
2 it is bigger than $\mathrm{O}^{2-}$ and $\mathrm{F}^{-}$
3 it is bigger than $\mathrm{F}^{-}$and $\mathrm{N}$, but smaller than of $\mathrm{O}^{2-}$
4 it is smaller than $\mathrm{O}^{2-}$ and $\mathrm{F}^{-}$, but bigger than of $\mathrm{N}$
(JEE Main 2021
Classification of Elements and Periodicity in Properties

89434 In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is

1 electronegativity
2 electron gain enthalpy
3 ionisation enthalpy
4 atomic radius
(JEE Main 2020
Join With Us for More Updates
Classification of Elements and Periodicity in Properties

89423 The ions $\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+}, \mathrm{Mg}^{2+}$ and $\mathrm{Al}^{3+}$ are isoelectronic. Their ionic radii show :

1 $\mathrm{A}$ decrease from $\mathrm{O}^{2-}$ to $\mathrm{F}^{-}$and then increase from $\mathrm{Na}^{+}$to $\mathrm{Al}^{3+}$
2 A significant increase from $\mathrm{O}^{2-}$ to $\mathrm{Al}^{3+}$
3 A significant decrease from $\mathrm{O}^{2-}$ to $\mathrm{Al}^{3+}$
4 An increase from $\mathrm{O}^{2-}$ to $\mathrm{F}^{-}$and then decrease from $\mathrm{Na}^{+}$to $\mathrm{Al}^{3+}$
BITSAT 2013
Classification of Elements and Periodicity in Properties

89426 Which among the following property increases, as we move down group-I of the periodic table?

1 Electronegativity
2 Ionic radius
3 Melting point
4 Ionization enthalpy
Shift-II
Classification of Elements and Periodicity in Properties

89431 The ions $\mathrm{S}^{2-}, \mathrm{C} \tau, \mathrm{K}^{+}, \mathrm{Ca}^{2+}$ are iso-electronic. Their ionic radii show

1 A decrease from $\mathrm{S}^{2-}$ to $\mathrm{Cl}$ and then increase from $\mathrm{K}^{+}$to $\mathrm{Ca}^{2+}$
2 An increase from $\mathrm{S}^{2-}$ to $\mathrm{Cl}$ and then decrease from $\mathrm{K}^{+}$to $\mathrm{Ca}^{2+}$
3 A significant decrease from $\mathrm{S}^{2-}$ to $\mathrm{Ca}^{2+}$
4 A significant increase from $\mathrm{S}^{2-}$ to $\mathrm{Ca}^{2+}$
AP EAPCET 23-08-2021 Shift-I
Classification of Elements and Periodicity in Properties

89432 The ionic radii of $\mathrm{F}^{-}$and $\mathrm{O}^{2-}$ respectively are $1.33 \AA$ and $1.4 \AA$ while the covalent radius of $\mathrm{N}$ is $0.74 \AA$. The correct statement for the ionic radius of $\mathrm{N}^{3-}$ from the following is

1 it is smaller than $\mathrm{F}^{-}$and $\mathrm{N}$
2 it is bigger than $\mathrm{O}^{2-}$ and $\mathrm{F}^{-}$
3 it is bigger than $\mathrm{F}^{-}$and $\mathrm{N}$, but smaller than of $\mathrm{O}^{2-}$
4 it is smaller than $\mathrm{O}^{2-}$ and $\mathrm{F}^{-}$, but bigger than of $\mathrm{N}$
(JEE Main 2021
Classification of Elements and Periodicity in Properties

89434 In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is

1 electronegativity
2 electron gain enthalpy
3 ionisation enthalpy
4 atomic radius
(JEE Main 2020
For More Updates join with Us
Classification of Elements and Periodicity in Properties

89423 The ions $\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+}, \mathrm{Mg}^{2+}$ and $\mathrm{Al}^{3+}$ are isoelectronic. Their ionic radii show :

1 $\mathrm{A}$ decrease from $\mathrm{O}^{2-}$ to $\mathrm{F}^{-}$and then increase from $\mathrm{Na}^{+}$to $\mathrm{Al}^{3+}$
2 A significant increase from $\mathrm{O}^{2-}$ to $\mathrm{Al}^{3+}$
3 A significant decrease from $\mathrm{O}^{2-}$ to $\mathrm{Al}^{3+}$
4 An increase from $\mathrm{O}^{2-}$ to $\mathrm{F}^{-}$and then decrease from $\mathrm{Na}^{+}$to $\mathrm{Al}^{3+}$
BITSAT 2013
Classification of Elements and Periodicity in Properties

89426 Which among the following property increases, as we move down group-I of the periodic table?

1 Electronegativity
2 Ionic radius
3 Melting point
4 Ionization enthalpy
Shift-II
Classification of Elements and Periodicity in Properties

89431 The ions $\mathrm{S}^{2-}, \mathrm{C} \tau, \mathrm{K}^{+}, \mathrm{Ca}^{2+}$ are iso-electronic. Their ionic radii show

1 A decrease from $\mathrm{S}^{2-}$ to $\mathrm{Cl}$ and then increase from $\mathrm{K}^{+}$to $\mathrm{Ca}^{2+}$
2 An increase from $\mathrm{S}^{2-}$ to $\mathrm{Cl}$ and then decrease from $\mathrm{K}^{+}$to $\mathrm{Ca}^{2+}$
3 A significant decrease from $\mathrm{S}^{2-}$ to $\mathrm{Ca}^{2+}$
4 A significant increase from $\mathrm{S}^{2-}$ to $\mathrm{Ca}^{2+}$
AP EAPCET 23-08-2021 Shift-I
Classification of Elements and Periodicity in Properties

89432 The ionic radii of $\mathrm{F}^{-}$and $\mathrm{O}^{2-}$ respectively are $1.33 \AA$ and $1.4 \AA$ while the covalent radius of $\mathrm{N}$ is $0.74 \AA$. The correct statement for the ionic radius of $\mathrm{N}^{3-}$ from the following is

1 it is smaller than $\mathrm{F}^{-}$and $\mathrm{N}$
2 it is bigger than $\mathrm{O}^{2-}$ and $\mathrm{F}^{-}$
3 it is bigger than $\mathrm{F}^{-}$and $\mathrm{N}$, but smaller than of $\mathrm{O}^{2-}$
4 it is smaller than $\mathrm{O}^{2-}$ and $\mathrm{F}^{-}$, but bigger than of $\mathrm{N}$
(JEE Main 2021
Classification of Elements and Periodicity in Properties

89434 In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is

1 electronegativity
2 electron gain enthalpy
3 ionisation enthalpy
4 atomic radius
(JEE Main 2020
NEET DIGITAL LIBRARY
Classification of Elements and Periodicity in Properties

89423 The ions $\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+}, \mathrm{Mg}^{2+}$ and $\mathrm{Al}^{3+}$ are isoelectronic. Their ionic radii show :

1 $\mathrm{A}$ decrease from $\mathrm{O}^{2-}$ to $\mathrm{F}^{-}$and then increase from $\mathrm{Na}^{+}$to $\mathrm{Al}^{3+}$
2 A significant increase from $\mathrm{O}^{2-}$ to $\mathrm{Al}^{3+}$
3 A significant decrease from $\mathrm{O}^{2-}$ to $\mathrm{Al}^{3+}$
4 An increase from $\mathrm{O}^{2-}$ to $\mathrm{F}^{-}$and then decrease from $\mathrm{Na}^{+}$to $\mathrm{Al}^{3+}$
BITSAT 2013
Classification of Elements and Periodicity in Properties

89426 Which among the following property increases, as we move down group-I of the periodic table?

1 Electronegativity
2 Ionic radius
3 Melting point
4 Ionization enthalpy
Shift-II
Classification of Elements and Periodicity in Properties

89431 The ions $\mathrm{S}^{2-}, \mathrm{C} \tau, \mathrm{K}^{+}, \mathrm{Ca}^{2+}$ are iso-electronic. Their ionic radii show

1 A decrease from $\mathrm{S}^{2-}$ to $\mathrm{Cl}$ and then increase from $\mathrm{K}^{+}$to $\mathrm{Ca}^{2+}$
2 An increase from $\mathrm{S}^{2-}$ to $\mathrm{Cl}$ and then decrease from $\mathrm{K}^{+}$to $\mathrm{Ca}^{2+}$
3 A significant decrease from $\mathrm{S}^{2-}$ to $\mathrm{Ca}^{2+}$
4 A significant increase from $\mathrm{S}^{2-}$ to $\mathrm{Ca}^{2+}$
AP EAPCET 23-08-2021 Shift-I
Classification of Elements and Periodicity in Properties

89432 The ionic radii of $\mathrm{F}^{-}$and $\mathrm{O}^{2-}$ respectively are $1.33 \AA$ and $1.4 \AA$ while the covalent radius of $\mathrm{N}$ is $0.74 \AA$. The correct statement for the ionic radius of $\mathrm{N}^{3-}$ from the following is

1 it is smaller than $\mathrm{F}^{-}$and $\mathrm{N}$
2 it is bigger than $\mathrm{O}^{2-}$ and $\mathrm{F}^{-}$
3 it is bigger than $\mathrm{F}^{-}$and $\mathrm{N}$, but smaller than of $\mathrm{O}^{2-}$
4 it is smaller than $\mathrm{O}^{2-}$ and $\mathrm{F}^{-}$, but bigger than of $\mathrm{N}$
(JEE Main 2021
Classification of Elements and Periodicity in Properties

89434 In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is

1 electronegativity
2 electron gain enthalpy
3 ionisation enthalpy
4 atomic radius
(JEE Main 2020