Three sisters visited a garden of red, white, blue and yellow flowers. one sister observed that if any four flowers were picked, one of them would be red. another observed that if any four were picked, at least one of them would be blue. the third sister noted that if any four were picked, at least one would be yellow. does this necessarily mean that if any four were picked, one would be white?

answer: 20

step-by-step explanation:

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.