Introduction

• Group 2 includes beryllium, magnesium, calcium, strontium, barium and radium. • These elements with the exception of beryllium are commonly known as the alkaline earth metals. • These are so called because their oxides and hydroxides are alkaline in nature and these metal oxides are found in the earth’s crust. • These elements have two electrons in the s -orbital of the valence shell. • Their general electronic configuration may be represented as [noble gas] ns2. • Like alkali metals, the compounds of these elements are also mainly ionic.

Pre-Requisites:

Alkali earth metals, elements, periodic table

Activity:

Bones and teeth have calcium in them.

Real Life Question:

Where do you find calcium in the body?

Key Words / FlashCards

Learning aids / Gadgets

Real life uses :

• Group 2 includes beryllium, magnesium, calcium, strontium, barium and radium. • These elements with the exception of beryllium are commonly known as the alkaline earth metals. • These are so called because their oxides and hydroxides are alkaline in nature and these metal oxides are found in the earth’s crust. • These elements have two electrons in the s -orbital of the valence shell. • Their general electronic configuration may be represented as [noble gas] ns2. • Like alkali metals, the compounds of these elements are also mainly ionic.

Places to visit :

Kitchen.

Practical examples around us

What you learn in Theory:

• Important ions for the body like calcium and magnesium belong to group 2 in the periodic table.

What you learn in Practice:

• Important ions for the body like calcium and magnesium belong to group 2 in the periodic table.