MCQ
The tenth elements in the periodic table resembles with the
- AFirst period
- ✓Second period
- CFourth group
- DNinth group
✓
Answer
Correct option: B.
Second period
b
$(b)$ Each period consists of a series of elements whose atom have the same principal quantum no. $(n)$ of the outer most shell i.e. In second period $n = 2$, this shell has four orbitals (one $2s$ and three $2p$) which can have eight electrons, hence second period contains $8$ elements from atomic no. $3$ to $10.$
$(b)$ Each period consists of a series of elements whose atom have the same principal quantum no. $(n)$ of the outer most shell i.e. In second period $n = 2$, this shell has four orbitals (one $2s$ and three $2p$) which can have eight electrons, hence second period contains $8$ elements from atomic no. $3$ to $10.$
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
$CH_3 -CH_2 -CH=CH_2$ has hybridisation
→The resistance of a conductivity cell with cell constant $1.14 \,\mathrm{~cm}^{-1}$, containing $0.001\, \mathrm{M}\, \mathrm{KCl}$ at $298\, \mathrm{~K}$ is $1500 \,\Omega$. The molar conductivity of $0.001\, \mathrm{M}\, \mathrm{KCl}$ solution at $298\, \mathrm{~K}$ in $\mathrm{S} \,\mathrm{cm}^{2}\, \mathrm{~mol}^{-1}$ is ...... . (Integer answer)
→On electrolysis of dil. sulphuric acid using Platinum $(Pt)$ electrode, the product obtained at anode will be:
→Which of the following Fischer projection formula is same as $D-$ Glyceraldehyde ?
→One fermi is $...$
→Consider the following reaction
→In this reaction $SbF_5$ acts as
product $(A)$ is
→Which of the following pair both compounds have no exsistance
Select the correct statement regarding shapes of
→$PCl _{5}, BrF _{5}, \& IF _{7}, BrF _{5} \& IF _{7}$
An atom emits energy equal to $4 \times 10^{-12} \, erg.$ To which part of electromagnetic spectrum it belongs :
→