Information: Adrian has saved up all his money from his allowances, which is $5 a week for the past year, his birthday, where he received $30 from his grandma, and
the 5 quarters he found at the park so that he can buy a new bike. The bike is
originally $230, but is on sale right now for 40% off the original price. Then in the
mail he found two coupons, one that says "$20 additional off sale items" and the
other that says "20% additional off sale items". Which coupon should he use to get
the best deal on the bike and why is it the better deal?

picture below

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: what are the following choices