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.
Democritus was the first scientist to create a model of the atom. He was the first one to discover that all matter is made up of invisible particles called atoms. He created the name atom from the Greek word atomos, which means uncuttable. He also discovered that atoms are solid, insdestructable, and unique.