After three half-lives, what fraction of a radioactive sample remains? 1/8 1/3 1/2 1/6

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Why is carbon ideal for making different compounds?

What information does a complete ionic equation give that the balanced equation doesn’t show?