Which statement does not correctly compare silicon with another element?

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u. s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?

Find the mass, in grams, of 5.00*10^23 molecules of f2

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?