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The first (IE(1)) and second (IE(2)) ion...

The first `(IE_(1))` and second `(IE_(2))` ionisation energies `(k J mol^(-1))` of a new elements designated by roman numerals are shown below:
`{:(,,IE_(1),IE_(2),),(I,,2370,5250,),(II,,520,7300,),(III,,900,1800,),(IV,,1700,3400,):}`
Which of the above elements is likely to be :
a. A reactive metal
b. A reactive non-metal
c. a noble gas
d. A metal that forms a stable binary halide of the formula `AX_(2)` (`X=` the halogen).

A

I,2372,5251

B

II,520,7300

C

III,900,1760

D

IV,1680,3380

Text Solution

Verified by Experts

The correct Answer is:
B
As alkali metals have the lowest `IE_(1)` value in their respective periods and also there is a large jump between `IE_(1) and IE_(2)` due to the removal of second electron from the noble gas core,therefore,out of the given `IE_(1)`and `IE_(2)` values,(II) belongs to alkali metals.
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The first (IE_(1)) and second (IE_(2)) ionisation energies (kJ mol^(-1)) of a new element designated by roman numericals are shown below: {: (,(IE_(1)),(IE_(2))),(I,2372,5251),(II,520,7300),(III,900,1760),(IV,1680,3380):} Which of these elements is likely to be (a) a reactive metal, (b) a reactive non-metal, (c) a noble gas and (d) a metal that forms a binary halide of the formula, AX_(2) .

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