Question
Give reasons: Noble gases possess relatively large atomic size.
✓
Answer
i. Noble gases have completely filled valence shell i.e., complete octet (except He with complete duplet).
ii. Since their valence shell contains eight electrons, they experience greater electronic repulsion and this results in increased atomic size (atomic radii) of the noble gas elements.
Hence, noble gases possess
ii. Since their valence shell contains eight electrons, they experience greater electronic repulsion and this results in increased atomic size (atomic radii) of the noble gas elements.
Hence, noble gases possess
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
What does violet colour of the solution in the activity mentioned in Q.2 indicate?
Define the terms:
i. Isotones
ii. Isoelectronic species
iii. Electronic configuration
i. Isotones
ii. Isoelectronic species
iii. Electronic configuration
Vitmin E is added to packed edible oil.
| Column ‘A’ | Column ‘B’ | ||
| i. | Inductive effect | a. | Delocalization of π electrons |
| ii. | Hyperconjugation | b. | Displacement of π electrons |
| iii. | Resonance effect | c. | Delocalization of σ electrons |
| d. | Displacement of σ electrons |
Complete the following table of displacement reactions. Identify oxidising and reducing agents involved.
→| Reactants | Products |
| $Zn_{(s)} +$ ————$_{(aq)}$ | ————$-_{(aq)} + Cu_{(s)}$ |
| $Cu_{(s)} + 2Ag^+_{(aq)}$ | —————–$ +$————– |
| ———– $+$ ————- | $Co _{( aq )}^{2+}+ Ni _{( s )}$ |
Write electronic configuration of $_{18}Ar$ and $ _{19}K$ using orbital notation and orbital diagram method.
→Explain mechanism of halogenation of alkanes.
Complete the following table:
Write short notes on: nuclear potential.
What is the SI unit of amount of a substance ?