The nonmetals helium, neon, and argon and the metals copper, silver, and gold are among only a few elements that are found in nature in their pure forms.

What can you infer about the
chemical reactivity of these elements?

Jessica is traveling from miami, florida, to chicago, illinois. using the map, tell one way the land will change during the second half of her trip.

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17