Group-1 Elements: Alkali Metals
CHXI10:THE S-BLOCK ELEMENTS

315892 The property of hydrogen which distinguishes it from other alkali metal is

1 Its electropositive character
2 Its affinity for non-metals
3 Its reducing character
4 Its non-metallic character
CHXI10:THE S-BLOCK ELEMENTS

315893 In aqueous solution, the largest ion is

1 \(\mathrm{Na}^{+}(\)aq. \()\)
2 \({\rm{C}}{{\rm{s}}^{\rm{ + }}}{\rm{(aq}}{\rm{.)}}\)
3 \({\rm{R}}{{\rm{b}}^{\rm{ + }}}{\rm{(aq}}{\rm{.)}}\)
4 \(\mathrm{Li}^{+}(\)aq.)
CHXI10:THE S-BLOCK ELEMENTS

315894 Among the alkali metals cesium is the most reactive because

1 Its incomplete shell is nearest to the nucleus
2 It has a single electron in the valence shell
3 It is the heaviest alkali metal
4 The outermost electron is more loosely bound than the outermost electron of the other alkali metals.
CHXI10:THE S-BLOCK ELEMENTS

315895 Alkali metals in each period have

1 smallest size
2 lowest ionization enthalpy
3 highest electron gain enthalpy
4 highest electronegativity.
CHXI10:THE S-BLOCK ELEMENTS

315896 Among alkali metal salts, the lithium salts are the poorest conductors of electricity in aqueous solution because of

1 easy diffusion of \(\mathrm{Li}^{+}\)ions
2 lower ability of \(\mathrm{Li}^{+}\)ions to polarize water molecules
3 lowest charge to radius ratio
4 higher degree of hydration of \(\mathrm{Li}^{+}\)ions.
CHXI10:THE S-BLOCK ELEMENTS

315892 The property of hydrogen which distinguishes it from other alkali metal is

1 Its electropositive character
2 Its affinity for non-metals
3 Its reducing character
4 Its non-metallic character
CHXI10:THE S-BLOCK ELEMENTS

315893 In aqueous solution, the largest ion is

1 \(\mathrm{Na}^{+}(\)aq. \()\)
2 \({\rm{C}}{{\rm{s}}^{\rm{ + }}}{\rm{(aq}}{\rm{.)}}\)
3 \({\rm{R}}{{\rm{b}}^{\rm{ + }}}{\rm{(aq}}{\rm{.)}}\)
4 \(\mathrm{Li}^{+}(\)aq.)
CHXI10:THE S-BLOCK ELEMENTS

315894 Among the alkali metals cesium is the most reactive because

1 Its incomplete shell is nearest to the nucleus
2 It has a single electron in the valence shell
3 It is the heaviest alkali metal
4 The outermost electron is more loosely bound than the outermost electron of the other alkali metals.
CHXI10:THE S-BLOCK ELEMENTS

315895 Alkali metals in each period have

1 smallest size
2 lowest ionization enthalpy
3 highest electron gain enthalpy
4 highest electronegativity.
CHXI10:THE S-BLOCK ELEMENTS

315896 Among alkali metal salts, the lithium salts are the poorest conductors of electricity in aqueous solution because of

1 easy diffusion of \(\mathrm{Li}^{+}\)ions
2 lower ability of \(\mathrm{Li}^{+}\)ions to polarize water molecules
3 lowest charge to radius ratio
4 higher degree of hydration of \(\mathrm{Li}^{+}\)ions.
CHXI10:THE S-BLOCK ELEMENTS

315892 The property of hydrogen which distinguishes it from other alkali metal is

1 Its electropositive character
2 Its affinity for non-metals
3 Its reducing character
4 Its non-metallic character
CHXI10:THE S-BLOCK ELEMENTS

315893 In aqueous solution, the largest ion is

1 \(\mathrm{Na}^{+}(\)aq. \()\)
2 \({\rm{C}}{{\rm{s}}^{\rm{ + }}}{\rm{(aq}}{\rm{.)}}\)
3 \({\rm{R}}{{\rm{b}}^{\rm{ + }}}{\rm{(aq}}{\rm{.)}}\)
4 \(\mathrm{Li}^{+}(\)aq.)
CHXI10:THE S-BLOCK ELEMENTS

315894 Among the alkali metals cesium is the most reactive because

1 Its incomplete shell is nearest to the nucleus
2 It has a single electron in the valence shell
3 It is the heaviest alkali metal
4 The outermost electron is more loosely bound than the outermost electron of the other alkali metals.
CHXI10:THE S-BLOCK ELEMENTS

315895 Alkali metals in each period have

1 smallest size
2 lowest ionization enthalpy
3 highest electron gain enthalpy
4 highest electronegativity.
CHXI10:THE S-BLOCK ELEMENTS

315896 Among alkali metal salts, the lithium salts are the poorest conductors of electricity in aqueous solution because of

1 easy diffusion of \(\mathrm{Li}^{+}\)ions
2 lower ability of \(\mathrm{Li}^{+}\)ions to polarize water molecules
3 lowest charge to radius ratio
4 higher degree of hydration of \(\mathrm{Li}^{+}\)ions.
CHXI10:THE S-BLOCK ELEMENTS

315892 The property of hydrogen which distinguishes it from other alkali metal is

1 Its electropositive character
2 Its affinity for non-metals
3 Its reducing character
4 Its non-metallic character
CHXI10:THE S-BLOCK ELEMENTS

315893 In aqueous solution, the largest ion is

1 \(\mathrm{Na}^{+}(\)aq. \()\)
2 \({\rm{C}}{{\rm{s}}^{\rm{ + }}}{\rm{(aq}}{\rm{.)}}\)
3 \({\rm{R}}{{\rm{b}}^{\rm{ + }}}{\rm{(aq}}{\rm{.)}}\)
4 \(\mathrm{Li}^{+}(\)aq.)
CHXI10:THE S-BLOCK ELEMENTS

315894 Among the alkali metals cesium is the most reactive because

1 Its incomplete shell is nearest to the nucleus
2 It has a single electron in the valence shell
3 It is the heaviest alkali metal
4 The outermost electron is more loosely bound than the outermost electron of the other alkali metals.
CHXI10:THE S-BLOCK ELEMENTS

315895 Alkali metals in each period have

1 smallest size
2 lowest ionization enthalpy
3 highest electron gain enthalpy
4 highest electronegativity.
CHXI10:THE S-BLOCK ELEMENTS

315896 Among alkali metal salts, the lithium salts are the poorest conductors of electricity in aqueous solution because of

1 easy diffusion of \(\mathrm{Li}^{+}\)ions
2 lower ability of \(\mathrm{Li}^{+}\)ions to polarize water molecules
3 lowest charge to radius ratio
4 higher degree of hydration of \(\mathrm{Li}^{+}\)ions.
CHXI10:THE S-BLOCK ELEMENTS

315892 The property of hydrogen which distinguishes it from other alkali metal is

1 Its electropositive character
2 Its affinity for non-metals
3 Its reducing character
4 Its non-metallic character
CHXI10:THE S-BLOCK ELEMENTS

315893 In aqueous solution, the largest ion is

1 \(\mathrm{Na}^{+}(\)aq. \()\)
2 \({\rm{C}}{{\rm{s}}^{\rm{ + }}}{\rm{(aq}}{\rm{.)}}\)
3 \({\rm{R}}{{\rm{b}}^{\rm{ + }}}{\rm{(aq}}{\rm{.)}}\)
4 \(\mathrm{Li}^{+}(\)aq.)
CHXI10:THE S-BLOCK ELEMENTS

315894 Among the alkali metals cesium is the most reactive because

1 Its incomplete shell is nearest to the nucleus
2 It has a single electron in the valence shell
3 It is the heaviest alkali metal
4 The outermost electron is more loosely bound than the outermost electron of the other alkali metals.
CHXI10:THE S-BLOCK ELEMENTS

315895 Alkali metals in each period have

1 smallest size
2 lowest ionization enthalpy
3 highest electron gain enthalpy
4 highest electronegativity.
CHXI10:THE S-BLOCK ELEMENTS

315896 Among alkali metal salts, the lithium salts are the poorest conductors of electricity in aqueous solution because of

1 easy diffusion of \(\mathrm{Li}^{+}\)ions
2 lower ability of \(\mathrm{Li}^{+}\)ions to polarize water molecules
3 lowest charge to radius ratio
4 higher degree of hydration of \(\mathrm{Li}^{+}\)ions.