A study found that there is no direct relationship between the time that 8th-grade students spend brushing their teeth and their final math grade for the year. Complete the following statement:

As the time that students spend brushing their teeth decreases, their corresponding final math grades .

A.) increase
B.) decrease
C.) cannot be predicted

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.