Sodium has higher I.E. because of smaller atomic size and hence greater nuclear attraction.
CHXI10:THE S-BLOCK ELEMENTS
315876
For alkali metals, which one of the following trends is incorrect?
1 Hydration energy :
2 Ionization energy:
3 Density : Li
4 Atomic size :
Explanation:
Density gradually increases on moving down from Li to Cs. Potassium is, however, lighter than sodium. The abnormal value of potassium is due to unusual increase in atomic size, i.e., atomic volume.
KCET - 2010
CHXI10:THE S-BLOCK ELEMENTS
315877
Alkali metal salts are
1 Diamagnetic and coloured
2 Diamagnetic and colourless
3 Paramagnetic and coloured
4 Paramagnetic and colourless
Explanation:
Conceptual Questions
CHXI10:THE S-BLOCK ELEMENTS
315878
Mark the false statement.
1 The electropositive character of alkali metals decreases with increase in atomic number.
2 Lithium is a hard metal and cannot be cut with a knife.
3 Alkali metals are strong reducing agents.
4 Electronegativities of all alkali metals lie between 1.0 and 0.7.
Explanation:
Electropositive character increases with increase in atomic number.
CHXI10:THE S-BLOCK ELEMENTS
315879
The characteristic not related to alkali metal is
1 Their ions are isoelectronic with noble gases
2 Low melting point
3 Low electronegativity
4 High ionisation energy.
Explanation:
The alkali metals have outer electronic configuration, thus on losing this , the ion formed will be isoelectronic with noble gases. The energy binding the atoms in the crystal lattices of these metals is relatively low due to presence of only one electron in the valence shell. Thus alkali metals have low melting points. Alkali metals are highly electropositive thus, they have low electronegativity. The alkali metals have large size and the outermost electron is far from the nucleus and thus have relatively low ionisation energies.
Sodium has higher I.E. because of smaller atomic size and hence greater nuclear attraction.
CHXI10:THE S-BLOCK ELEMENTS
315876
For alkali metals, which one of the following trends is incorrect?
1 Hydration energy :
2 Ionization energy:
3 Density : Li
4 Atomic size :
Explanation:
Density gradually increases on moving down from Li to Cs. Potassium is, however, lighter than sodium. The abnormal value of potassium is due to unusual increase in atomic size, i.e., atomic volume.
KCET - 2010
CHXI10:THE S-BLOCK ELEMENTS
315877
Alkali metal salts are
1 Diamagnetic and coloured
2 Diamagnetic and colourless
3 Paramagnetic and coloured
4 Paramagnetic and colourless
Explanation:
Conceptual Questions
CHXI10:THE S-BLOCK ELEMENTS
315878
Mark the false statement.
1 The electropositive character of alkali metals decreases with increase in atomic number.
2 Lithium is a hard metal and cannot be cut with a knife.
3 Alkali metals are strong reducing agents.
4 Electronegativities of all alkali metals lie between 1.0 and 0.7.
Explanation:
Electropositive character increases with increase in atomic number.
CHXI10:THE S-BLOCK ELEMENTS
315879
The characteristic not related to alkali metal is
1 Their ions are isoelectronic with noble gases
2 Low melting point
3 Low electronegativity
4 High ionisation energy.
Explanation:
The alkali metals have outer electronic configuration, thus on losing this , the ion formed will be isoelectronic with noble gases. The energy binding the atoms in the crystal lattices of these metals is relatively low due to presence of only one electron in the valence shell. Thus alkali metals have low melting points. Alkali metals are highly electropositive thus, they have low electronegativity. The alkali metals have large size and the outermost electron is far from the nucleus and thus have relatively low ionisation energies.
Sodium has higher I.E. because of smaller atomic size and hence greater nuclear attraction.
CHXI10:THE S-BLOCK ELEMENTS
315876
For alkali metals, which one of the following trends is incorrect?
1 Hydration energy :
2 Ionization energy:
3 Density : Li
4 Atomic size :
Explanation:
Density gradually increases on moving down from Li to Cs. Potassium is, however, lighter than sodium. The abnormal value of potassium is due to unusual increase in atomic size, i.e., atomic volume.
KCET - 2010
CHXI10:THE S-BLOCK ELEMENTS
315877
Alkali metal salts are
1 Diamagnetic and coloured
2 Diamagnetic and colourless
3 Paramagnetic and coloured
4 Paramagnetic and colourless
Explanation:
Conceptual Questions
CHXI10:THE S-BLOCK ELEMENTS
315878
Mark the false statement.
1 The electropositive character of alkali metals decreases with increase in atomic number.
2 Lithium is a hard metal and cannot be cut with a knife.
3 Alkali metals are strong reducing agents.
4 Electronegativities of all alkali metals lie between 1.0 and 0.7.
Explanation:
Electropositive character increases with increase in atomic number.
CHXI10:THE S-BLOCK ELEMENTS
315879
The characteristic not related to alkali metal is
1 Their ions are isoelectronic with noble gases
2 Low melting point
3 Low electronegativity
4 High ionisation energy.
Explanation:
The alkali metals have outer electronic configuration, thus on losing this , the ion formed will be isoelectronic with noble gases. The energy binding the atoms in the crystal lattices of these metals is relatively low due to presence of only one electron in the valence shell. Thus alkali metals have low melting points. Alkali metals are highly electropositive thus, they have low electronegativity. The alkali metals have large size and the outermost electron is far from the nucleus and thus have relatively low ionisation energies.
Sodium has higher I.E. because of smaller atomic size and hence greater nuclear attraction.
CHXI10:THE S-BLOCK ELEMENTS
315876
For alkali metals, which one of the following trends is incorrect?
1 Hydration energy :
2 Ionization energy:
3 Density : Li
4 Atomic size :
Explanation:
Density gradually increases on moving down from Li to Cs. Potassium is, however, lighter than sodium. The abnormal value of potassium is due to unusual increase in atomic size, i.e., atomic volume.
KCET - 2010
CHXI10:THE S-BLOCK ELEMENTS
315877
Alkali metal salts are
1 Diamagnetic and coloured
2 Diamagnetic and colourless
3 Paramagnetic and coloured
4 Paramagnetic and colourless
Explanation:
Conceptual Questions
CHXI10:THE S-BLOCK ELEMENTS
315878
Mark the false statement.
1 The electropositive character of alkali metals decreases with increase in atomic number.
2 Lithium is a hard metal and cannot be cut with a knife.
3 Alkali metals are strong reducing agents.
4 Electronegativities of all alkali metals lie between 1.0 and 0.7.
Explanation:
Electropositive character increases with increase in atomic number.
CHXI10:THE S-BLOCK ELEMENTS
315879
The characteristic not related to alkali metal is
1 Their ions are isoelectronic with noble gases
2 Low melting point
3 Low electronegativity
4 High ionisation energy.
Explanation:
The alkali metals have outer electronic configuration, thus on losing this , the ion formed will be isoelectronic with noble gases. The energy binding the atoms in the crystal lattices of these metals is relatively low due to presence of only one electron in the valence shell. Thus alkali metals have low melting points. Alkali metals are highly electropositive thus, they have low electronegativity. The alkali metals have large size and the outermost electron is far from the nucleus and thus have relatively low ionisation energies.
Sodium has higher I.E. because of smaller atomic size and hence greater nuclear attraction.
CHXI10:THE S-BLOCK ELEMENTS
315876
For alkali metals, which one of the following trends is incorrect?
1 Hydration energy :
2 Ionization energy:
3 Density : Li
4 Atomic size :
Explanation:
Density gradually increases on moving down from Li to Cs. Potassium is, however, lighter than sodium. The abnormal value of potassium is due to unusual increase in atomic size, i.e., atomic volume.
KCET - 2010
CHXI10:THE S-BLOCK ELEMENTS
315877
Alkali metal salts are
1 Diamagnetic and coloured
2 Diamagnetic and colourless
3 Paramagnetic and coloured
4 Paramagnetic and colourless
Explanation:
Conceptual Questions
CHXI10:THE S-BLOCK ELEMENTS
315878
Mark the false statement.
1 The electropositive character of alkali metals decreases with increase in atomic number.
2 Lithium is a hard metal and cannot be cut with a knife.
3 Alkali metals are strong reducing agents.
4 Electronegativities of all alkali metals lie between 1.0 and 0.7.
Explanation:
Electropositive character increases with increase in atomic number.
CHXI10:THE S-BLOCK ELEMENTS
315879
The characteristic not related to alkali metal is
1 Their ions are isoelectronic with noble gases
2 Low melting point
3 Low electronegativity
4 High ionisation energy.
Explanation:
The alkali metals have outer electronic configuration, thus on losing this , the ion formed will be isoelectronic with noble gases. The energy binding the atoms in the crystal lattices of these metals is relatively low due to presence of only one electron in the valence shell. Thus alkali metals have low melting points. Alkali metals are highly electropositive thus, they have low electronegativity. The alkali metals have large size and the outermost electron is far from the nucleus and thus have relatively low ionisation energies.
