<span>The salad dressing is known as a compound dressing. A compound is simply a combination, or mixture, of two or more ingrediants.
Physical properties include, density, hardness, melting, and boiling points. Flammability is considered a chemical property along with vapor, concentration, etc.
Wood is not a reliable conductor for heat, while Copper is considered the best.</span>
I’m 95% sure it’s covalent bonds.
It means that you consider the elements as a list organized by atomic number, the property is seen to repeat over and over as you move through that list.
