Protons and neutrons are found group together in the a) electron cloud
b) charge
c) periodic table
d) nucleus

Write the complete balanced equation for the reaction between lead (iv) oxide (pbo2) and water (h2o).

Iknow the answer is a but i don't know why

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.