Q. 4.53 - An Introduction to General, Organic, and Biological Chemistry

Question

What is the group number and number of valence electrons for each of the following elements?

a. Magnesium

b. Iodine

c. Oxygen

d. Phosphorus

e. Tin

f. Boron

Step-by-Step Solution

Answer

Group number and valence electrons of elements are:

(a) Magnesium: Group is $2A$$\left(2\right)$; $2$ valence electrons

(b) Iodine: Group is $7A \left(17\right)$ ; $7$valence electrons

(c) Oxygen: Group is $6A \left(16\right)$ ; $6$ valence electrons

(d) Phosphorus: Group is $5A \left(15\right)$ ; $5$ valence electrons

(e) Tin: Group is $4A \left(14\right)$ ; $4$ valence electrons

(f) Boron: Group is $3A \left(13\right)$ ; $3$ valence electrons

Part (a) Step 1: Given Information

We need to find the group number and number of valence electrons for magnesium.

Part (a) Step 2: Explanation

As group number of magnesium is $2A \left(2\right)$, magnesium has two valence electrons.

Part (b) Step 1: Given Information

We need to find the group number and number of valence electrons for iodine.

Part (b) Step 2: Explanation

As group number of iodine is $7A \left(17\right)$, iodine has seven valence electrons.

Part (c) Step 1: Given Information

We need to find the group number and number of valence electrons for oxygen.

Part (c) Step 2: Explanation

As group number of oxygen is $6A \left(16\right)$, oxygen has six valence electrons.

Part (d) Step 1: Given Information

We need to find the group number and number of valence electrons for phosphorus.

Part (d) Step 2: Explanation

As group number of phosphorus is $5A \left(15\right)$ , phosphorus has five valence electrons.

Part (e) Step 1: Given Information

We need to find the group number and number of valence electrons for tin.

Part (e) Step 2: Explanation

As group number of tin is $4A \left(14\right)$ , tin has four valence electrons.

Part (f) Step 1: Given Information

We need to find the group number and number of valence electrons for boron.

Part (f) Step 2: Explanation

As group number of boron is $3A \left(13\right)$ , boron has three valence electrons.