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Reaction with Metals

Ionisation en...

Question

Ionisation enthalpies of elements of second period are given below:
Ionisation enthalpy/ $K J m o l^{- 1} : 520, 899, 801, 1086, 1402, 1314, 1681, 2080$ .

Match the correct enthalpy with the elements and complete the graph given in the figure. Also, write symbols of elements with their atomic number.

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Solution

Ionisation enthalpy order of second period elements is:
$L i < B < B e < C < O < N < F < N e$

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Ionisation enthalpies of elements of second period are given below Ioniisation enthalpy / k cal $m o l^{- 1}$ : 520, 899, 801, 1086, 1402, 1314, 1681,2080. Match the correct enthalpy with the elements and complete the graph given in figure. Also write symols of elements with their atomic number.

Q. For the second period elements the correct increasing order of first ionisation enthalpy is:

Q. For the second period elements, the correct increasing order of first ionisation enthalpy is:

Define ionisation enthalpy. Discuss the factors affecting ionisation enthalpy of the elements and its trends in the periodic table.

Δ H_{1}

Δ H_{2}

) ionisation enthalpies (in kJ

m o l^{- 1}

Δ_{e g} H

) electron gain enthalpy (in kJ

m o l^{- 1}

) of a few elements are given below:
Elements

Δ_{1} H_{1}

Δ_{1} H_{2}

Δ_{e g} H

(A) P 520 7300 -60
(B) Q 419 3051 -48
(C) R 1681 3374 -328
(D) S 1008 1846 -295
(E) T 2372 5251 +48
(F) U 738 1451 -40
The most reactive metal is :

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