1) A compound is made up of two or more ___________________ of atoms.  a) different types b) similar types c) bonded pairs d) identical sets 2) Matter is defined as anything that has ______________ and volume.  a) density b) mass c) length d) height 3) Oxygen is considered a(n) ____________________ because it is made of one type of atom. a) molecular compound b) proton c) electron d) molecular element 4) We identify elements by the number of _________________ in their nucleus. a) protons b) neutrons c) quarks d) electrons 5) Atoms are made up of ________________________. a) protons and electrons only b) electron shells c) mostly empty space d) nucleus only 6) A molecule is made up of two or more __________________ bonded together. a) elements b) atoms c) compounds d) liquids 7) In this image, what is the name of the orange part with the '+' on it?  a) electron shell b) nucleus c) electron d) proton e) neutron 8) In this image, what is the name of the purple part with the '-' on it? a) electron shell b) nucleus c) electron d) proton e) neutron 9) Water (H2O) is a molecular element.  a) true b) false 10) Elements can have more than one atom, but not more than one TYPE of atom.  a) true b) false 11) NaCl (salt) is considered a compound.  a) true b) false 12) Electrons have no charge. a) true b) false 13) A molecule of carbon dioxide (CO2) contains a) two carbon atoms and two oxygen atoms b) one carbon atom and two oxygen atoms 14) Carbon dioxide (CO2) is a molecular compound. a) true b) false 15) The smallest atom on the periodic table is _________________ a) oxygen b) carbon c) hydrogen d) helium

Atoms, Elements, Molecules and Compounds

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