Why isn't the mass of the electron included in the mass of an atom on the periodic table?

Q2. Which of these is a mixture? 1. chlorine 2. sodium chloride solution 3. sodium 4, sodium chloride

Which of the following elements in the periodic table have nonmetallic properties

Which one has the lowest b. p. based on their polarities? H2O, CH4, SeCl2, CHCl3?

How many grams of sodium nitrate does it take to get 3.5% sodium nitrate in a 250g solution?

According to the Law of Conservation of mass, A matter is always created in a chemical reaction. B matter is always destroyed in a chemical reaction. C matter is created and then destroyed in a chemical reaction.

What are three conditions that can cause chemical reactions to occur?

Facts about heat absorption and simple questions about heat absorption with answer

You measure a piece of wood with a meter stick and is it exactly one meter long. How many centimeters long is it?

When salt dissolved in water, what type of change occurs? A) physical only B) chemical only C) physical and chemical

Select all of the characteristics that define matter. A.) Matter has mass. B.) Matter has volume (takes up space). C.) Atoms and compounds are made out of matter. D.) All matter has the same density.