An atom that has a charge because it has gained or lost electrons is

a. an ion
b. an isotope
c. a new element

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.

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?

Which of the following is the molecular formula for a simple sugar? a. cooh b. h2o c. oh d. c6h12o6