Two elements, X and Y are in the same group on the periodic table because they both have the same

Assessment: WAEC SSCE - Chemistry - 2012 (Objective) Subject: Chemistry

Question 1 Report

Two elements, X and Y are in the same group on the periodic table because they both have the same

Answer Details
The correct answer is "number of valence electrons". Elements in the same group on the periodic table have similar chemical and physical properties because they have the same number of valence electrons, which are the electrons in the outermost energy level of an atom. Valence electrons are important because they are involved in chemical bonding, which determines the reactivity and behavior of elements. Therefore, elements in the same group have similar chemical reactivity and tend to form similar types of chemical bonds.
Read lesson note on Periodic Chemistry (Nigeria Only) (WAEC)
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