Which is the best method of obtaining pure water from lemonade?

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

What’s the theoretical yield of solid lead

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth