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 (3)
The elements in Group 2 have similar chemical properties 'cause they have the same no. of electrons.
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.
The answer is (d) number of valence electrons. Group 2 elements, known as alkaline earth metals, have two valence electrons in their outer shell, leading to similar reactivity. This similarity results from their tendency to lose these two electrons during chemical reactions for stability.
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