Algonquin College Health Program Assessment (AC-HPAT) Practice Exam

What is the most common electrical charge of the ions in group 2 elements?

1. +1

2. +2

3. 0

4. -1

The correct answer is: -1

The group 2 elements in the periodic table are known as the alkaline earth metals, which include elements such as beryllium, magnesium, calcium, and others. These elements typically have two electrons in their outermost shell. To achieve stability and attain a full outer electron configuration, which is generally associated with noble gases, group 2 elements tend to lose these two outer electrons. By losing two electrons, these elements form ions with a charge of +2. This significant behavior of group 2 elements reflects their tendency to exhibit a +2 charge when they ionize. Thus, the correct response regarding the most common electrical charge of the ions in group 2 elements is +2. Understanding this characteristic is essential for grasping the ionic properties and reactivities of alkaline earth metals in various chemical reactions.