An element has a half-life of 5.0 days. How many days would pass before only 1/8th of the original amount of a sample of this
element remained?

What type of reaction is zn + cucl2 → cu + zncl2?

Which statement is best described as a atom

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.