Which of the alkali metal is having least melting point?
(a) Na (b) K (c) Rb (d) Cs

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Solution

Atomicsize increases as we move down the alkali group. As a result, thebinding energies of their atoms in the crystal lattice decrease.Also, the strength of metallic bonds decreases on moving down a groupin the periodic table. This causes a decrease in the melting point.Among the given metals, Cs is the largest and has the least meltingpoint.

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The alkali metals are low melting . Which of the following alkali metal is expected to melt if the room temperature rises to $30^{\circ}$ C?
(a) Na (b) K (c) Rb (d) Cs

Q. Which of the alkali metal is having least melting point ?

Q. Consider the following statements :
(I)

C s^{+}

ion is more highly hydrated than other alkali metal ions.
(II) Among the alkali metals

L i, N a, K,

and

R b, L i

has the higher melting point.
(III) Among the alkali metals, only

L i

forms a stable nitride by direct combination.

Q. Among alkali metals which element do you expect to be least electronegative
a). K. B). Na. C). Cs. D.) Fr

Q. Consider the following statements:
1.

C s^{+}

is more highly hydrated than the other alkali metal ions.
2. Among the alkali metals

L i, N a, K

and

R b

, lithium has the highest melting point.
3. Among the alkali metals only lithium forms a stable nitride by direct combination.
Out of these statements:

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Which of the alkali metal is having least melting point?(a) Na (b) K (c) Rb (d) Cs

Which of the alkali metal is having least melting point?
(a) Na (b) K (c) Rb (d) Cs