Aquantity decreases from 35 to 30 ? what is the percent change ?

14.28%

Step-by-step explanation:

1) you have many different formulas for % change the one i'm using is :

n

n= new quantity

o=old quantity

-x= % change(since the quantity decreases the numerator will be negative)

so

30-35=-5

cross multiply:

-500=-35x

divide on both sides:

14.285=x

hope this helps!

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.