[" 17.The atomic number of Sn is 50.The shape of "],[" gaseous SnCl,molecule is "],[[" (a) "C+Sn-Cl," (b) "," Sn "," (? "],[," Cl "" Cl "," (9) "],[," (c) "(Cl)/(" Sn ")<=(|)/(" Cl ")," (d) "," Sn "],[" Cl "," Cl "]]