How many electrons are in the valence shells of (a) Be in BeCl2 (b) B in BCl3 (c) H in H2O ?

1 Answer
Meave60
Apr 8, 2015

(a) Be has 4 valence electrons in the compound #"BeCl"_2#. Be has 2 valence electrons of its own and shares 1 electron with each of the two chlorine atoms.

http://pixshark.com/becl2.htm

(b) B has 6 valence electrons in the compound #"BCl"_3"#. B has 3 valence electrons of its own and shares 1 electron with each of the three chlorine atoms.

http://khtpschool.ning.com/profiles/blogs/6295747:BlogPost:31603

(c) Each H atom in #"H"_2"O"# has 2 valence electrons. Each H atom has 1 valence electron of its own and shares 1 electron with the oxygen atom.

https://www.boundless.com/chemistry/textbooks/boundless-chemistry-textbook/basic-concepts-of-chemical-bonding-9/lewis-dot-symbols-and-lewis-structures-71/introduction-to-lewis-structures-for-covalent-molecules-333-7499/images/alternate-view-of-lewis-dot-structure-of-water/

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