EVERYDAY SCIENCE

Detailed explanation-1: -The number of valence electrons of an atom can be obtained from the periodic table because it is equal to the group number of the atom.

Detailed explanation-2: -The number of valence electrons With the exception of groups 3–12 (the transition metals), the units digit of the group number identifies how many valence electrons are associated with a neutral atom of an element listed under that particular column.

Detailed explanation-3: -9 Element Families Alkali Metals: Group 1 (IA)-1 valence electron. Alkaline Earth Metals: Group 2 (IIA)-2 valence electrons. Transition Metals: Groups 3-12-d and f block metals have 2 valence electrons. Boron Group or Earth Metals: Group 13 (IIIA)-3 valence electrons.

Detailed explanation-4: -The group/family number is the number assigned to the vertical columns of the periodic table. Elements within the same group have the same number of valence electrons. This similar electron configuration leads to the elements in the same group having similar chemical properties.

Detailed explanation-5: -In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the 14 f-block columns, between groups 2 and 3, are not numbered.