What do u do when there are parentheses for example (3+2) but the exponent is not inside of the parentheses. do u add it the same as if it were in the parentheses.

i do not know the answer

step-by-step explanation:

h/o/e/s mad

step-by-step explanation:

si si si

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.

ratio is 2 : 9

the answer is three

13.5 : 3