Which of the following is NOT true of halogens:

W) iodine is the least reactive of the stable halogens

X) elemental halogens exist as diatomic molecules containing single covalent bonds

Y) their outermost electron configuration is represented by ns\({}^{2}\)np\({}^{6}\)

Z) halides of typical metals are ionic
Y) THEIR OUTERMOST ELECTRON CONFIGATION IS REPRESENTED BY NS\({}^{2}\)NP\({}^{6}\)