10. Periodic Properties of the Elements
Valence Electrons of Elements
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Here it says, how many inner core and valence electrons would a would a silicon atom possess? So atom means that it's a neutral element, and when we look, silicon has an atomic number of 14 on the periodic table. So remember, your atomic number, which is connected to your total number of electrons equals your valence electrons, which for main group element is just your group number, plus your inner core electrons. Here, the atomic number, again, we said is 14. Silicon is in group 4 a on the periodic table. Since it's in group 4 a, it has 4 valence electrons. So we already know we have 4 valence electrons. And all we have to do here to find the number of inner core electrons is subtract 4 from both sides, and what's left is 10. That 10 would equal the number of inner core electrons. So we'd say that's the silicon atom has 4 valence electrons in single group 4 a, and it has 10 inner core electrons.
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