# (solved)Question 3.6 of NCERT Class XI Chemistry Chapter 3

Write the atomic number of the element present in the third period and seventeenth group of the periodic table.

## Categories | About Hoven's Blog

,

### Question 3.6NCERT Class XI Chemistry

Write the atomic number of the element present in the third period and seventeenth group of the periodic table.

### Solution in Detail(video solution below this)

P3 and G17 $\displaystyle \implies$ config ends in 3p5

Noble gas in previous, i.e., P2 is Ne

by aufbau config is [Ne] 3s23p5

$\displaystyle \implies$ Z = 10 [Ne] + 2 + 5 = 17

$\displaystyle \implies$ element is Chlorine (Cl) $\displaystyle \underline{Ans}$

### Video Explanation

Please watch this youtube video for a quick explanation of the solution: