CHEMY $101$ Final Exam.$**$

Part $1$a: Multiple choice questions $(01-017)$ Total marks: $17(1$ Mark eac

Q$1.$ An unknown element $x$ reacts with bromine to form an ionic compound, $xB{r}_3.$ If $x^{3+}$ ion has $10$ electrons, identify the element.

a$)Mg$

b$)Be$

c$)Li$

d$)Na$

e$)Al$