Hydrogen is a molecule but H is an atom why give reason​

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.

Compare and contrast refraction of light and sound will give brainliest

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?