MCQ
On moving down a group of regular elements, both atomic and ionic radii increases with increasing
- ✓Atomic number
- BAtomic weight
- CAtomic mass
- DNone of these
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Identify $A$

$\Delta E = - 2.0 \times {10^{ - 18}}\,J\left( {\frac{1}{{n_2^2}} - \frac{1}{{n_1^2}}} \right)$
the wavelength of the light that must be absorbed to excite hydrogen electron from level $n\, = 1$ to level $n\, = 2$ will be: $(h\, = 6.625\times10^{-34}\, J\,s,\, C\, = 3\times10^8\, m\,s^{-1})$
Given : $\frac{2.303 RT }{ F }=0.059\,V$