3. Fill the paint cup about 2/3 of the way with paint and lock it onto the sprayer. Whether the spray cup attaches to the bottom of the sprayer with a clamping assembly and hooks or screws on, be sure to attach it securely; you do not want the spray cup to drop off suddenly while in use.
The periodic table provides a useful framework for analyzing chemical behaviour, and is widely used in chemistry and other sciences. Dmitri Mendeleev published in 1869 the first widely recognized periodic table. He developed his table to illustrate periodic trends in the properties of the then-known elements.
- Enrico Fermi Although the problem of transmuting chemical elements into each other is much older than a satisfactory definition of the very concept of chemical element, it is well known that the first and most important step towards its solution was made only nineteen years ago by the late Lord Rutherford, who started the method of the nuclear bombardments.