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

89453 The energy and radius of electron present in second orbit of $\mathrm{He}^{+}$respectively are

1 $-1.09 \times 10^{-18} \mathrm{~J}, 105.8 \mathrm{pm}$
2 $-8.72 \times 10^{-18} \mathrm{~J}, 211.6 \mathrm{pm}$
3 $-4.36 \times 10^{-18}$ J, $52.9 \mathrm{pm}$
4 $-2.18 \times 10^{-18} \mathrm{~J}, 105.8 \mathrm{pm}$
Classification of Elements and Periodicity in Properties

89473 Among the elements Ca, Mg, $P$ and $C l$, the order of increasing radii is

1 Mg $<$ Ca $<$ Cl $<$ P
2 Cl $<$ P $<$ Mg $<$ Ca
3 P $<\mathrm{Cl}<\mathrm{Ca}<\mathrm{Mg}$
4 $\mathrm{Ca}<\mathrm{Mg}<$ P $<\mathrm{Cl}$
Classification of Elements and Periodicity in Properties

89482 The atom of smallest atomic radius among the following is

1 $\mathrm{Na}$
2 $\mathrm{K}$
3 $\mathrm{Br}$
4 $\mathrm{Li}$
Classification of Elements and Periodicity in Properties

89489 Consider the following abbreviations for hydrated alkali ions. $\mathbf{X}=\left[\mathrm{Li}\left(\mathrm{H}_2 \mathrm{O}\right)_{\mathrm{n}}\right]^{+} ; \quad \mathbf{Y}=\left[\mathbf{K}\left(\mathrm{H}_2 \mathrm{O}\right)_{\mathrm{n}}\right]^{+} ; \mathbf{Z}=\left[\mathrm{Cs}\left(\mathrm{H}_2 \mathrm{O}\right)_{\mathrm{n}}\right]^{+}$ Which is the correct order of size of these hydrated alkali ions?

1 $\mathrm{X}>\mathrm{Y}>\mathrm{Z}$
2 $\mathrm{Z}>\mathrm{Y}>\mathrm{X}$
3 $\mathrm{X}=\mathrm{Y}=\mathrm{Z}$
4 $\mathrm{Z}>\mathrm{X}>\mathrm{Y}$
Classification of Elements and Periodicity in Properties

89453 The energy and radius of electron present in second orbit of $\mathrm{He}^{+}$respectively are

1 $-1.09 \times 10^{-18} \mathrm{~J}, 105.8 \mathrm{pm}$
2 $-8.72 \times 10^{-18} \mathrm{~J}, 211.6 \mathrm{pm}$
3 $-4.36 \times 10^{-18}$ J, $52.9 \mathrm{pm}$
4 $-2.18 \times 10^{-18} \mathrm{~J}, 105.8 \mathrm{pm}$
Classification of Elements and Periodicity in Properties

89473 Among the elements Ca, Mg, $P$ and $C l$, the order of increasing radii is

1 Mg $<$ Ca $<$ Cl $<$ P
2 Cl $<$ P $<$ Mg $<$ Ca
3 P $<\mathrm{Cl}<\mathrm{Ca}<\mathrm{Mg}$
4 $\mathrm{Ca}<\mathrm{Mg}<$ P $<\mathrm{Cl}$
Classification of Elements and Periodicity in Properties

89482 The atom of smallest atomic radius among the following is

1 $\mathrm{Na}$
2 $\mathrm{K}$
3 $\mathrm{Br}$
4 $\mathrm{Li}$
Classification of Elements and Periodicity in Properties

89489 Consider the following abbreviations for hydrated alkali ions. $\mathbf{X}=\left[\mathrm{Li}\left(\mathrm{H}_2 \mathrm{O}\right)_{\mathrm{n}}\right]^{+} ; \quad \mathbf{Y}=\left[\mathbf{K}\left(\mathrm{H}_2 \mathrm{O}\right)_{\mathrm{n}}\right]^{+} ; \mathbf{Z}=\left[\mathrm{Cs}\left(\mathrm{H}_2 \mathrm{O}\right)_{\mathrm{n}}\right]^{+}$ Which is the correct order of size of these hydrated alkali ions?

1 $\mathrm{X}>\mathrm{Y}>\mathrm{Z}$
2 $\mathrm{Z}>\mathrm{Y}>\mathrm{X}$
3 $\mathrm{X}=\mathrm{Y}=\mathrm{Z}$
4 $\mathrm{Z}>\mathrm{X}>\mathrm{Y}$
Classification of Elements and Periodicity in Properties

89453 The energy and radius of electron present in second orbit of $\mathrm{He}^{+}$respectively are

1 $-1.09 \times 10^{-18} \mathrm{~J}, 105.8 \mathrm{pm}$
2 $-8.72 \times 10^{-18} \mathrm{~J}, 211.6 \mathrm{pm}$
3 $-4.36 \times 10^{-18}$ J, $52.9 \mathrm{pm}$
4 $-2.18 \times 10^{-18} \mathrm{~J}, 105.8 \mathrm{pm}$
Classification of Elements and Periodicity in Properties

89473 Among the elements Ca, Mg, $P$ and $C l$, the order of increasing radii is

1 Mg $<$ Ca $<$ Cl $<$ P
2 Cl $<$ P $<$ Mg $<$ Ca
3 P $<\mathrm{Cl}<\mathrm{Ca}<\mathrm{Mg}$
4 $\mathrm{Ca}<\mathrm{Mg}<$ P $<\mathrm{Cl}$
Classification of Elements and Periodicity in Properties

89482 The atom of smallest atomic radius among the following is

1 $\mathrm{Na}$
2 $\mathrm{K}$
3 $\mathrm{Br}$
4 $\mathrm{Li}$
Classification of Elements and Periodicity in Properties

89489 Consider the following abbreviations for hydrated alkali ions. $\mathbf{X}=\left[\mathrm{Li}\left(\mathrm{H}_2 \mathrm{O}\right)_{\mathrm{n}}\right]^{+} ; \quad \mathbf{Y}=\left[\mathbf{K}\left(\mathrm{H}_2 \mathrm{O}\right)_{\mathrm{n}}\right]^{+} ; \mathbf{Z}=\left[\mathrm{Cs}\left(\mathrm{H}_2 \mathrm{O}\right)_{\mathrm{n}}\right]^{+}$ Which is the correct order of size of these hydrated alkali ions?

1 $\mathrm{X}>\mathrm{Y}>\mathrm{Z}$
2 $\mathrm{Z}>\mathrm{Y}>\mathrm{X}$
3 $\mathrm{X}=\mathrm{Y}=\mathrm{Z}$
4 $\mathrm{Z}>\mathrm{X}>\mathrm{Y}$
Classification of Elements and Periodicity in Properties

89453 The energy and radius of electron present in second orbit of $\mathrm{He}^{+}$respectively are

1 $-1.09 \times 10^{-18} \mathrm{~J}, 105.8 \mathrm{pm}$
2 $-8.72 \times 10^{-18} \mathrm{~J}, 211.6 \mathrm{pm}$
3 $-4.36 \times 10^{-18}$ J, $52.9 \mathrm{pm}$
4 $-2.18 \times 10^{-18} \mathrm{~J}, 105.8 \mathrm{pm}$
Classification of Elements and Periodicity in Properties

89473 Among the elements Ca, Mg, $P$ and $C l$, the order of increasing radii is

1 Mg $<$ Ca $<$ Cl $<$ P
2 Cl $<$ P $<$ Mg $<$ Ca
3 P $<\mathrm{Cl}<\mathrm{Ca}<\mathrm{Mg}$
4 $\mathrm{Ca}<\mathrm{Mg}<$ P $<\mathrm{Cl}$
Classification of Elements and Periodicity in Properties

89482 The atom of smallest atomic radius among the following is

1 $\mathrm{Na}$
2 $\mathrm{K}$
3 $\mathrm{Br}$
4 $\mathrm{Li}$
Classification of Elements and Periodicity in Properties

89489 Consider the following abbreviations for hydrated alkali ions. $\mathbf{X}=\left[\mathrm{Li}\left(\mathrm{H}_2 \mathrm{O}\right)_{\mathrm{n}}\right]^{+} ; \quad \mathbf{Y}=\left[\mathbf{K}\left(\mathrm{H}_2 \mathrm{O}\right)_{\mathrm{n}}\right]^{+} ; \mathbf{Z}=\left[\mathrm{Cs}\left(\mathrm{H}_2 \mathrm{O}\right)_{\mathrm{n}}\right]^{+}$ Which is the correct order of size of these hydrated alkali ions?

1 $\mathrm{X}>\mathrm{Y}>\mathrm{Z}$
2 $\mathrm{Z}>\mathrm{Y}>\mathrm{X}$
3 $\mathrm{X}=\mathrm{Y}=\mathrm{Z}$
4 $\mathrm{Z}>\mathrm{X}>\mathrm{Y}$