Q 21
Order the expressions from least to greatest when x=5.
20 - X
2x
X+1
4x - 3

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.

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13

use distributive property on all like terms and change your signs if you have a double negative or if you have positive/negative

the answer is b