Given a 800 mg sample of thorium-231 decomposes via beta emission with a half life of 25.5 hours, how long would it take, in days, for the sample to decay down to 25 mg?

231 0 231

th - > beta pa

90 - 1 91

800 mg / 25 mg

Which statement correctly describes protons?

Which of these pairs of arrows shows the direction of the stress that causes the lateral fault? Arrow F and Arrow C Arrow A and Arrow E Arrow B and Arrow D Arrow C and Arrow B

Although Plato and Aristotle disagreed with democritus what did his theory suggest was true about all matter?

The density of an aqueous solution of sulfuric acid is 1.36 g/mL and the concentration is 3.43 M. What is the concentration of this solution in percent by mass?

Which description below correctly describes the hydrogen bonding between water molecules? A. The slightly negative hydrogen on one water molecule is attracted to a slightly positive hydrogen on another molecule of water. B.

What is the number of electrons in an atom of 23v that have an quantum number of 2?

Two basic properties of the solid phase are

Decomposition reaction of Ag3N

Name three types of particles found in an atom and explain how they differ

Which impurity can bioaccumulate in aquatic systems? A. Mercury B. Sulfur C. Carbon Dioxide D. Methane