Assertion A: Alkali metal elements impart cha | vedclass

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(A) Alkali metals have low ionization enthalpy,which means their valence electrons are loosely held.When these metals are heated in a flame,the energy

Vedclass · Accepted Answer

Both $A$ and $R$ are true and $R$ is the correct explanation of $A$.

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(A) Alkali metals have low ionization enthalpy,which means their valence electrons are loosely held.When these metals are heated in a flame,the energy from the flame is sufficient to excite these valence electrons to higher energy levels.When these excited electrons return to the ground state,they emit energy in the form of visible light,which gives a characteristic color to the flame.Therefore,both the assertion and the reason are true,and the reason correctly explains the assertion.

Assertion $A$: Alkali metal elements impart characteristic colors to the flame in a flame test.
Reason $R$: They have very low ionization enthalpy.

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Assertion $A$: Alkali metal elements impart characteristic colors to the flame in a flame test.Reason $R$: They have very low ionization enthalpy.