based-on-their-position-on-the-periodic-table-how-many-core-and-valence-electron

Question

Based on their position on the periodic table, how many core and valence electrons do the following elements have?

(i) Arsenic

(ii) Antimony

(iii) Strontium

(iv) Beryllium

Accepted Answer

(i) 28 core electrons & 5 valence electrons

(ii) 46 core electrons & 5 valence electrons

(iii) 36 core electrons & 2 valence electrons

(iv) 2 core electrons & 2 valence electrons

Answer

(i) 5 core electrons & 28 valence electrons

(ii) 5 core electrons & 46 valence electrons

(iii) 2 core electrons & 36 valence electrons

(iv) 2 core electrons & 2 valence electrons

Answer

(i) 33 core electrons & 28 valence electrons

(ii) 51 core electrons & 46 valence electrons

(iii) 38 core electrons & 36 valence electrons

(iv) 4 core electrons & 2 valence electrons

Answer

(i) 28 core electrons & 33 valence electrons

(ii) 46 core electrons & 51 valence electrons

(iii) 36 core electrons & 38 valence electrons

(iv) 2 core electrons & 4 valence electrons