• # question_answer 42) Predict the formulae of the stable binary compounds that would be formed by the combination of the following pairs of elements: (a) Lithium and oxygen (b) Magnesium and nitrogen (c) Aluminium and iodine (d) Silicon and oxygen (e) Phosphorus and fluorine (f) Element 71 and fluorine

(a) $L{{i}_{2}}O;$ Li - val 1 and O - val 2 (b) $M{{g}_{3}}{{N}_{2}};$ Mg - val 2 and N - val 3 (c) $Al{{I}_{3}};$ Al - val 3 and I - val 1 (d) $Si{{O}_{2}}$; Si - val 4 and O - val2 (e) $P{{F}_{3}}\,\text{or}\,\text{P}{{\text{F}}_{5}}$; P - val 3 or 5 and F - val 1 (f) $Lu{{F}_{3}}$; Lu - val 3 and F - val 1