Magnesium has a charge of +2, and chlorine has a charge of –1. To form a chemical bond, how many magnesium ion(s) would the compound have? 0 1 2 3

1

Explanation:

Just one. Because from the way compounds are named and or written. The elements exchange their number of valence electron to complement each other. So, a magnesium of +2 and a Chlorine of -1 when exchanged would give the formula of

MgCl(2)

And as we can tell from the formula of the compound I just write down, Magnesium has just a single ion in it, while Chlorine has 2.

So the answer is 1.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.