Question

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,
1​

Answer 1

Answer:

Both a and r are true and r is the correct explanation of a

MARK THE BRAINLIEST

Answer 2

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).