5. 160 mg of radioactive metal X is used in the laboratory. The half-life is measured to be 80 mins.

A. What is the mass of this radioactive metal remaining after 6 hours?

B. How long does it take to reduce the mass to 1.25 mg?

List four observations that indicate that a chemical reaction may be taking place

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum