2.) how much does he earn on sales of $3,000? 3.) how much must he sell in order to earn $3,000? 4.) a. how much is the discount? b. what is the sale price? 5.) a. how much was the tax? b. what was the total cost? 6.) the highest of the three shooting percentages?

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.