Cobalt-60 decays into nickel-60 via beta decay with a half-life of 5.27 years. A purse sample of cobalt-60 is prepared, with no contamination of other isotopes. After 5.27 years, what is the ratio of cobalt-60 to nickel-60 in the sample?

What diagram shows the ionic compound of magnesium oxide

The rules of engagement (roe) working group is often used to (select all that apply.)

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together