Another element is silvery-white with a shiny luster, is very brittle, and forms ions with a −2 charge. give one possible identity of this element. enter the symbol for the element.

It is Telurium

Explanation:

This element since belong to the family VI A in the periodic table, the charge -2 is the most common of these elements. Also, its color is silver - white, because is a metalloid has luster (a property of metals) and is very brittle ( a property of non-metals). Its symbol is Te.

the answer is b ) square root of 5

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.