In a tin (Sn) atom, there are _______ valence electron and _______ core electrons. 


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Hi Ely! The easiest way to fix this is to look at the regular table and also find believe (Sn). Valence electrons are those in the outermost covering of the atom, while core electrons space the electrons in every various other shell the atom has. As you move over to the best on the regular table, every atom gains one valence electron (Make certain to skip the D group, the steels in the middle of the table). Once you look whereby tin is, that is in heat 5. Rubidium has actually 1 valence electron, Strontium has 2 valence electrons, Indium has 3 valence electrons, and also Tin has actually 4 valence electrons.

The atom number is the number of protons that an atom has. If that is electrically neutral (like believe in the relaxing state), climate an atom has actually the same variety of electrons. Individually 4 from 50, we obtain that tin has 46 main point electrons.

Hope this helps!


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