2.1 Atoms, Ions, and Molecules

1			All the following are lesser elements in our bodies except
			A)	potassium.
			B)	sulfur.
			C)	nitrogen.
			D)	chlorine.
2			Valence electrons
			A)	determine chemical bonding properties.
			B)	are electrons of the outermost shell.
			C)	have a maximum number of eight.
			D)	All of the above.
3			The transfer of electrons from one atom to another is called
			A)	ionization.
			B)	isotope formation.
			C)	dehydration synthesis.
			D)	hydrolysis.
4			If an atom undergoes ionization to lose two electrons, what is its new charge?
			A)	negative two
			B)	negative one
			C)	positive two
			D)	positive one

2.2 Water and Mixtures

5			Molecules that freely dissolve in water are said to be
			A)	hydrophilic.
			B)	hydrophobic.
			C)	hypertonic.
			D)	hypotonic.
6			When counting items we commonly refer to twelve of something as "a dozen." What is the term used to describe Avogadro's number of 6.023 X 10 to the 23rd?
			A)	a gram
			B)	a cubic centimeter
			C)	a milliliter
			D)	a mole

2.3 Energy and Chemical Reactions

7			A catalyst would
			A)	reduce reaction time.
			B)	increase reaction time.
			C)	not alter the reaction time.
			D)	stop the reaction.
8			What type of reaction is represented in the following chemical equation? AB ---> A + B
			A)	decomposition reaction
			B)	synthesis reaction
			C)	exchange reaction
			D)	reversible reaction

2.4 Organic Compounds

9			ATP is commonly used as a(n) ________________.
			A)	enzyme.
			B)	protein.
			C)	nucleic acid.
			D)	energy currency molecule for the cell.
10			The removal of a phosphate group would yield
			A)	a large amount of energy.
			B)	biological inactivity of the molecule.
			C)	GDP.
			D)	None of the above.