6-An element M reacts with chlorine to form MCL2 and with oxigen to form MO2 and with nitrogen to form the most likely candidate for the element is (a) LI (b) Mg (c) Al (d) SI 7- which species does not have an octet of electron for its outer core? (a) c4- (b) P3+ (c) O2- (d) MG+ 8- An element that has the valence electron configuration 3S23P3belongs to which period and groupd (a) period 3; group 3A (b) period 3; group 5A (c) period 4; group 3A (d) period 4 ; group 5A