Choose the correct answer

1			A solution is a
			A)	heterogeneous substance.
			B)	chemical compound.
			C)	homogeneous mixture.
			D)	pure substance.
2			Which one of the following is not characteristic of a compound?
			A)	has a specific boiling point and freezing point
			B)	is not chemically altered by a change in state
			C)	its elements are present in a specific ratio
			D)	cannot be broken down into two or more elements by chemical means
3			The person who first established the relative masses of different elements was
			A)	Robert Boyle.
			B)	Jean Rey.
			C)	Georg Stahl.
			D)	John Dalton.
4			The name halogen means
			A)	inert gas.
			B)	salt former.
			C)	bad odor.
			D)	acid former.
5			The alkali metals
			A)	have relatively high melting points.
			B)	form unstable compounds with nonmetals.
			C)	are inactive chemically.
			D)	react with dilute acids to liberate hydrogen.
6			From left to right, each period of the periodic table terminates in a(n)
			A)	inert gas.
			B)	active metal.
			C)	weakly active nonmetal.
			D)	highly active nonmetal.
7			The rare-earth and actinide elements belong to the
			A)	halogens.
			B)	transition metals.
			C)	inert gases.
			D)	alkali metals.
8			Across any period of the periodic table
			A)	metallic activity decreases to the right.
			B)	metallic activity increases to the right.
			C)	metallic activity remains constant to the right.
			D)	nonmetallic activity decreases to the right.
9			Organic compounds are covalent compounds that all contain the element
			A)	oxygen.
			B)	nitrogen.
			C)	carbon.
			D)	sulfur.
10			The hydroxides contain the
			A)	NH4+ ion.
			B)	NO3− ion.
			C)	SO42− ion.
			D)	OH− ion.
11			In the chemical formula KNO3, the subscript 3 represents
			A)	3 molecules of KNO3.
			B)	3 oxygen atoms.
			C)	3 NO atom groups.
			D)	1/3 atom of oxygen.