Q55P - Chemistry: Molecular Nature Of Matter And Change

Question

The elements in Groups $\mathbf{1}\mathbf{A}\left(1\right)$ and  $\mathbf{7}\mathbf{A}\mathbf{\left(}\mathbf{17}\mathbf{\right)}$are all quite reactive. What is the major difference between them?

Step-by-Step Solution

Answer

The major difference between them is given below:

The elements in Group $\mathbf{1}\mathbf{A}\left(1\right)$are metal while the elements in Group $\mathbf{7}\mathbf{A}\left(17\right)$are nonmetals.

The elements in Group $\mathbf{1}\mathbf{A}\left(1\right)$donate a single electron readily to form monovalent cations while the elements in Group 7A (17) accept a single electron easily to form monovalent anions.

Step1: Elements in Groups 1A(1)

Alkali metals are metals present in Group $\mathbf{1}\mathbf{A}\left(1\right)$that lose one electron quickly to generate monocations.

Step 2: Elements in Groups 7A(17)

The elements in Group $\mathbf{7}\mathbf{A}\left(17\right)$are nonmetals and have a special name called the halogens which gain one electron rapidly to generate monoanions.