Question

Alkaline earth metals include elements.

Answer 1

• The elements present in the second group of the periodic table are known as alkaline earth metals. This group includes six elements.
• They are called alkaline earth metals because they form alkaline solutions, and hydroxides when they react with water. The term alkaline means that the solution has a pH greater than seven and is basic.
• The alkaline earth metals are placed in the second group from top to bottom in the order:

1. Beryllium $\left(\mathrm{Be}\right)$
2. Magnesium $\left(\mathrm{Mg}\right)$
3. Calcium $\left(\mathrm{Ca}\right)$
4. Strontium $\left(\mathrm{Sr}\right)$
5. Barium $\left(\mathrm{Ba}\right)$
6. Radium $\left(\mathrm{Ra}\right)$

Hence, alkaline earth metals include six elements.