Q 4.52 - An Introduction to General, Organic, and Biological Chemistry

Question

Identify the elements that have following electron arrangements:

Step-by-Step Solution

Answer

Our required elements are:

(a) Nitrogen

(b) Sulfur

(c) Carbon

(d) Potassium

(e) Aluminum

Part	Element	Energy Level
		$1$	$2$	$3$	$4$
a	Nitrogen	$2$	$5$
b	Sulfur	$2$	$8$	$6$
c	Carbon	$2$	$4$
d	Potassium	$2$	$8$	$8$	$1$
e	Aluminum	$2$	$8$	$3$

Part (a) Step 1: Given information

We need to identify element with electron arrangement: $2 , 5$

Part (a) Step 2: Explanation

Element having atomic number $7$ with $2$ electrons  in $1^{st}$energy level , $5$ electron in $2^{nd}$ energy level is nitrogen.

Hence, element is nitrogen .

Part (b) Step 1: Given information

We need to identify element with electron arrangement: $2 , 8, 6$

Part (b) Step 2: Explanation

Element having atomic number $16$ with $2$electrons  in $1^{st}$ energy level , $8$ electrons in $2^{nd}$ energy level and $6$ electrons in $3^{rd}$ energy level is sulfur .

Hence, element is sulfur. 

Part (c) Step 1: Given information

We need to identify element with electron arrangement: $2, 4$

Part (c) Step 2: Explanation

Element having atomic number $6$ with $2$ electrons  in $1^{st}$ energy level , $4$ electrons in $2^{nd}$ energy level  is carbon. 

Hence, element is carbon. 

Part (d) Step 1: Given information

We need to identify element with electron arrangement:$2, 8, 8, 1$

Part (d) Step 2: Explanation

Element having atomic number $19$  with $2$ electrons  in $1^{st}$energy level , $8$ electrons in $2^{nd}$ and $3^{rd}$ energy levels and $1$ electron in $4^{th}$ energy level is potassium.

Hence, element is potassium. 

Part (e) Step 1: Given information

We need to identify element with electron arrangement: $2, 8, 3$

Part (e) Step 2: Explanation

Element having atomic number $13$ with $2$ electrons  in $1^{st}$ energy level , $8$ electrons in $2^{nd}$ energy level and $3$ electrons in $3^{rd}$energy level is aluminum .

Hence, element is aluminum.