A When matter changes from one ^substance to another, that ^change is: ^A) Chemical B) Physical ^A A(n) _____ is the smallest ^unit of an element. ^A) Atom B) Nucleus ^ ^B If an atom has 13 protons its ^_____ ______ is 13. ^A) Atomic mass ^B) Atomic number ^A Two or more atoms of an ^element with different atomic ^weights are called A) Isotopes^B) Covalents. ^B What is a substance in which ^two or more different elements^are combined? ^A) Molecule B) Compound ^A NaCl + H(2)O gives Na(+) ^+ Cl(-): this is an example ^of a A) Solution ^B) Suspension ^A _____ is the monosaccharide ^made by green plants. ^A) Glucose B) Glycogen ^ ^B Fats, oils and waxes are ^common: ^A) Carbohydrates B) Lipids ^ ^B What is the basic building ^block of protein molecules? ^A) Glucose B) Amino Acids ^ ^B Enzymes are proteins that act ^as catalysts and are part of ^the product formed. ^A) True B) False ^
