The ratio of the sum k and 12 to 15 is the same as the ratio of 30 to 25. what is k?

step-by-step explanation:

it's 15

answer: hey there,

the answer you are looking for is a..

hope this you!

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.

answer: the answer is   graph (a)