if an element [x] contains 8 protons, 8 neutrons and 8 electrons, the atomic number of the element is ?

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

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.

Tell me the iupac name of the following compounds: