Which element is classified as a metalloid?
a.
Boron
b. Potassium
C.
Sulfur
d. Xenon

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

Which piece of equipment would me most useful for measuring the volume of some water? a. pan balance b. graduated cylinder c. tweezers d. flask quick

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife