The IE1 and the IE2 in kJ mol-1 of a few elements designated by Roman numerals are shown below- I II- IE1 400 589- IE2 2510 1120- -Elements I and II respectively are likely to be-

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Standard XII

Chemistry

Ionization Enthalpy

The IE1 and t...

Question

The $(I E_{1})$ and the $(I E_{2})$ in $k J m o l^{- 1}$ of a few elements designated by Roman numerals are shown below:
$\begin{matrix} I & I I I E_{1} & 400 & 589 I E_{2} & 2510 & 1120 \end{matrix}$
Elements $I$ and $I I$ respectively are likely to be?

Non-metal, alkali metal

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Alkali metal, alkaline earth metal

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Alkaline earth metal, non metal

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Alkaline earth metal, alkali metal

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Solution

The correct option is B Alkali metal, alkaline earth metal
For $I$ , the second ionization energy is 6 times that of the first ionization energy. This huge jump indicates that the atom attains a stable electronic configuration after the removal of the first electron. Hence, it must br an alkali metal.

For $I I$ , the first ionization energy is lower than the second ionization energy and there is no significant jump. So, it must be an alkaline earth metal.

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Similar questions

Q. The

(I E_{1})

and the

(I E_{2})

k J m o l^{- 1}

of a few elements designated by Roman numerals are shown below:

\begin{matrix} I & I I I E_{1} & 400 & 589 I E_{2} & 2510 & 1120 \end{matrix}

Elements

I

and

I I

respectively are likely to be?

Q. The ionization enthalpies,

(I E)_{1}

and the

(I E)_{2}

in kJ mol

^{- 1}

of a few elements designated by Roman numerals are shown below :

Element	$(I E)_{1}$	$(I E)_{2}$
A	2372	5251
B	520	7300
C	900	1760
D	1680	3380

Which of the above elements form a stable binary halide of the formula

M X_{2}

Q. The

(I E)_{1}

and the

(I E)_{2}

in kJ mol

^{- 1}

of a few elements designated by Roman numerals are shown below

Element	$(I E)_{1}$	$(I E)_{2}$
A	2372	5251
B	520	7300
C	900	1760
D	1680	3380

Based on above information, Which represents a noble gas ?

Q. The first (

I E_{1}

) and second (

I E_{2}

) ionization energies (kJ/mol) of a few elements designated by Roman numerals are given below. Which of these would be an alkali metal?

Q. The

{(I E)}_{1}

an dthe

{(I E)}_{2}

in kJ

{m o l}^{- 1}

of few elements designated by Roman numerals are shown below:

Element

{(I E)}_{1}

{(I E)}_{2}

1 2372 5251 2 520 7300 3 900 1760 4 1680 3380 Which of the above elements is likely to be a (a) reactive metal (b) reactive non-metal (c) noble gas (d) metal that forms a stable binary halide of the

{A X}_{2}

Write the sequence of your answer.

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The (IE1) and the (IE2) in kJ mol−1 of a few elements designated by Roman numerals are shown below: IIIIE1400589IE225101120 Elements I and II respectively are likely to be?

The $(I E_{1})$ and the $(I E_{2})$ in $k J m o l^{- 1}$ of a few elements designated by Roman numerals are shown below:
$\begin{matrix} I & I I I E_{1} & 400 & 589 I E_{2} & 2510 & 1120 \end{matrix}$
Elements $I$ and $I I$ respectively are likely to be?