Question

The elements in Group 2 have similar chemical properties because each atom of these elements has the same

(a) atomic number
(b) mass number
(c) number of electron shells
(d) number of valence electrons

Answer 1

The elements in Group 2 have similar chemical properties 'cause they have the same no. of electrons.

Answer 2

Answer;

- (d) number of valence electrons

The elements in Group 2 have similar chemical properties because each atom of these elements has the same number of valence electrons.

Explanation;

-Group 2 elements are also called alkaline earth metals, such as calcium, magnesium, strontium, barium , etc.

-These metals have a valency of two, which means they have two electrons in the outermost energy shell. Therefore; they react by loosing two electrons to form a stable configuration or an octet configuration. They are highly metallic and are good conductors of electricity.