Question

Predict the period, group and block of an element having electronic configuration $1s^{2}2s^{2}2p^{6}3s^{2}3p^{4}$ .

• A. $Period=3^{r d},block=p,group=16$
• B. $Period=3^{r d},block=p,group=10$
• C. $Period=4^{t h},block=d,group=12$
• D. $Period=5^{t h},block=s,group=1$

Answer 1

Answer: (A)

By observing principal quantum number (n), Orbital $\left(\right.s,p,d,f\left.\right)$ and equating no. of $e^{-}$ ’s

we are able to find the period, block and group of element in periodic table.