1) The smallest part of a compound is: a) a molecule  b) a proton c) an atom d) an electron  2) How many atoms can fit in a period of a sentence? a) about 5 million b) 1000-2000 c) around 10 d) over 100 3) The smallest part of an element is: a) a molecule b) a compound c) a solution d) an atom 4) All matter is made up of a) sugar and salt b) peas c) water d) atoms and molecules 5) What state is true a) atoms and molecules can be seen easily without a microscope b) some atoms and molecules can be seen with a light microscope c) atoms and molecules are too small to see with a light microscope d) none are correct  6) There are _____ known elements. a) over 100 b) over a million c) over 1000 d) about 10 7) Which are not elements? a) Oxygen chlorine, nitrogen b) Gold, iron, aluminum c) water, carbon, table salt d) Helium, sodium, carbon 8) Water (H2O) and table salt (NaCl) are examples of: a) a compound b) solutions c) atoms d) gases 9) A substance made up of only one kind of atoms is : a) a mixture b) a solution c) a compound d) an element  10) Two or more elements can combine chemically to form a completely new substance, called- a) a mixture b) an atom c) a compound d) a solution 

Atoms and Molecules

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