Download App

STD 11 - 3. Classification of elements and periodicity in properties — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 3. Classification of elements and periodicity in properties4 Marks
Question
Ionic radii are
✓

Answer

c
(c) $n^{th}$ Ionic radius in the nth orbit is given by ${r_n} = \frac{{{n^2}a}}{z}$ or ${r_n} \propto \frac{1}{Z}$

where $n$ is principal equation no., $a$ bohr's radius of hydrogen atom and $Z$ is the effective nuclear energy.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Which of the following will give green hydrated ion
→
The chemical equivalent of silver is $108$. If the current in a silver voltameter is $2\, Amp$., the time required to deposit $27\, grams$ of silver will be ............ $\mathrm{hrs}$
→
$116\, g$ of a substance upon dissociation reaction, yields $7.5 \,g$ of hydrogen, $60 \,g$ of oxygen and $48.5\, g$ of carbon. Given that the atomic masses of $H , O$ and $C$ are $1,16$ and $12$ respectively. The data agrees with how many formulae of the following?

$(A)$ $CH _{3} COOH$

$(B)$ $HCHO$

$(C)$ $CH _{3} OOCH _{3}$

$(D)$ $CH _{3} CHO$

→
A bond with maximum covalent character between non-metallic elements is formed
→
Which one of the following group$-15$ hydride is the strongest reducing agent?
→
Based on the equation

$\Delta E =  - 2.0 \times {10^{ - 18}}\,J\left( {\frac{1}{{n_2^2}} - \frac{1}{{n_1^2}}} \right)$ 

the wavelength of the light that must be absorbed to excite hydrogen electron from level $n\, = 1$ to level $n\, = 2$ will be: $(h\, = 6.625\times10^{-34}\, J\,s,\, C\, = 3\times10^8\, m\,s^{-1})$

→
Which of the following aqueous solutions are isotonic $(R = 0.082$  $atm$  ${K^{ - 1}}mo{l^{ - 1}})$
→
The metal that forms a self protecting film of oxide to prevent corrosion, is
→
The two types of bonds present in ${B_2}{H_6}$ are covalent and
→
How many moles of $H_2O$ are liberatd when one mole hydrated $MgCl_2$ is heated?
→