Periodic Classification of Elements
easy

हीलियम एक अक्रियाशील गैस है जबकि निऑन की अभिक्रियाशीलता अत्यंत कम है। इनके परमाणुओं में कोई समानता है?

Option A
Option B
Option C
Option D

Solution

Both helium $(He)$ and neon $(Ne)$ have filled outermost shells. Helium has a duplet in its $K$ shell, while neon has an octet in its $L$ shell.

Standard 10
Science

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