Which is most likely the result of millions of metal atoms crowding together so that molecular orbitals become combined? A) the loss of metallic properties
B) the formation of bands in a crystal
C) the loss of valence electrons to other atoms
D) the formation of localized valence electrons

Drive down any three characteristic of modern periodic table

Can someone me with questions 12 and 13 plz.

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?