13. Assertion : Sodium is an element of group 1 of the modern
periodic table.
Reason : All the elements of group 1 of the modern periodic table contain
two electrons in their outermost shell,
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Both a and r are true and r is the correct explanation of a
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Assertion is correct, but Reason is wrong and does not explain the Assertion correctly.
- All group 1 elements, including sodium (Na) contain only one valence electron in their respective s-orbital of their outermost shell.
- These elements have the tendency to undergo oxidation and lose this valence electron to attain stable electronic configuration of the nearest noble gas.
- Sodium undergoes oxidation and loses its valence electron to become a stable atom with electric configuration of Neon (Ne).
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