Note that you can work out the number of neutrons by subtracting the atomic number from the mass number. In this example, it is 35 – 17 = 18 neutrons.

For example, the formula for carbon dioxide is CO 2. It contains one carbon atom and two oxygen atoms. Using the mass numbers from the periodic table, the A r of carbon is 12, and the A r of ...

Mass production facilitates the efficient production of a large number of similar products ... frozen meals) An early example of the demand for standardized products in large quantities came ...