Place the following elements in order of increasing ionization energy. Argon(Ar)
Magnesium(Mg)
Phosphorus(P)
Chlorine(Cl)

A.) Mg, P,Cl, Ar

B.) Ar, Cl, P,Mg

C.) Cl, P,Ar, Mg

D.) Not enough information is given

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

In 2002, the rare earth elements mine in mountain pass, california was closed because

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.