Question

an unidentified bivalent metal M reacts with an unidentified halogen X to form

Answer 1

Answer:

MX2

Halogens have single valency and two atoms of halogens have to form compound with a bivalent metal.

HOPE THIS BRING A SMILE IN YOUR FACE

Explanation:

Answer 2

MX₂ Answer:

Explanation:   the metal is bivalent

i.e.  +2 charge (positive charge as it is a metal)

And the halogen is univalent

i.e.   -1 charge (halogens are non metals therefore negative charge)

So we will require -2 charge from 2 halogens to balance the +2 charge on one ametal.

There fore the formula will be MX₂

Alternatively:-

Simply cross multiply the charges.

2 will be multiplied by X

and 1 by M

Again giving us MX₂