Generally the Ionization enthalpy in a period increases but there are some exceptions, the one which is not an exception is

Be and B

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N and O

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Mg and Al

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Na and Mg

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Solution

The correct option is D
Na and Mg

The ionization energy increases normally from sodium to Magnesium as the size of Mg is smaller than Na.

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Similar questions

Generally the ionization enthalpy in a period increases but there are some exceptions, the one which is not an exception is?

Q. Generally, the first ionization enthalpy increases along a period with few exceptions. Choose the correct option which is not an exception.

Q. The first ionization enthalpies of

N a, M g, A l

and

S i

are in the order:

The first ionistation enthalpies of Na, Mg, Al, and Si are in the order
(a) Na< Mg > Al < Si (b) Na> Mg > Al > Si
(c) Na< Mg< Al< Si (d) Na> Mg> Al < Si

Q. Consider the elements

M g, A l, S, P

and

S i,

the correct increasing order of their first ionization enthalpy is :

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Generally the Ionization enthalpy in a period increases but there are some exceptions, the one which is not an exception is

The correct option is D Na and Mg The ionization energy increases normally from sodium to Magnesium as the size of Mg is smaller than Na.

The correct option is D
Na and Mg

The ionization energy increases normally from sodium to Magnesium as the size of Mg is smaller than Na.