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A : Noble gases have highest ionization ...

A : Noble gases have highest ionization energies in their respective periods .
R : The outer most sub-shell of noble gases in which electron enters is completely filled .

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion , then mark (1)

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion , then mark (2)

C

If Assertion is true statement but Reason is false , then mark (3)

D

If both Assertion and Reason are false statements , then mark (4)

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Assertion : Noble gases have highest ionisation enthalpies in their respective periods. Reason : Noble gases have stable closed shell electronic configuration.

The elements of group II are known as alkaline earth metals. The electronic configuration of these elements is ns^(2) and oxidation state is +2 . They have higher ionization energy than alkali metals in their respective period due to their small size and completely filled s-orbital. These elements give characteristic colour to bunsen flame. magnesium is used in the preparation of Grignard agent (RMgX) which is used in organic chemistry for preparation of sevaral organic compounds like alcohols. acids, hydrocarbons. Q. The correct order of 1st ionization energy is

The elements of group II are known as alkaline earth metals. The electronic configuration of these elements is ns^(2) and oxidation state is +2 . They have higher ionization energy than alkali metals in their respective period due to their small size and completely filled s-orbital. These elements give characteristic colour to bunsen flame. magnesium is used in the preparation of Grignard agent (RMgX) which is used in organic chemistry for preparation of sevaral organic compounds like alcohols. acids, hydrocarbons. Q. The reaction of RMgX with water will produces

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Why do noble gases have positive electron gain enthalpies?

Statement-1 : Noble gases have high ionisation energy. Statement-2 : Noble gases belong to 18^(th) group.

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Give reasons why? Noble gases have Zero electron affinity.

Why do the alkali metals possess minimum and the noble gases maximum ionisation energies in respective periods ?

All the noble gases are colourless and tasteless monoatomic gases. In general, noble gases are least reactive and their inertness to chemical reactivity is attributed to the following reasons. Reactive and their inertness to chemical reactivity is attributed to the following reasons. (i)Except helium, all have completely filled ns^(2)np^(6) electronic configuration in their valence shells. (ii)All have high ionisation enthalpy and more positive electron gain enthalpy. However, a number of xenon compounds mainly with most electronegative elements like fluorine and oxygen have been synthesized under different conditions and fluorides of xenon have been used as an oxidising agent and a fluorinating agent in many of the chemical reactions Select the correct statement.