Calculating Valence Electrons in Si 1cm3 Crystal

[matt222]

Homework Statement

calculate how many valence electrons there are in a 1cm3 crystal of silicon?

Homework Equations

The Attempt at a Solution

the outer shell of si element has 4 electrons, i think this is my answer

 

[MichaelXY]

No I think you need to know the density of Si, and calculate mass. Convert mass in grams to avagadros number. Each atom has a valence shell.

 

[kaisxuans]

every atom does have a valence shell but some are stable gases. careful with the numbers. try using a periodic table to ensure your answer and rmb 1cm3 is 1cm x 1cm x 1cm. don't just x3 it. many people make these mistakes