How are the periods or horizontal rows on a periodic table ordered? by similar state of matter. by increasing number of protons. by decreasing number of neutrons. in groups by number of electrons.

What’s a special glass that most beakers are made of

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?

Which is true of a liquid? it has a definite volume but not a definite mass. it has a definite mass but not a definite volume. it has a definite volume but not a definite shape. it has a definite shape but not a definite volume.