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) compound b) proton c) electron d) element 4) We identify elements by the number of _________________ in their nucleus. a) protons b) neutrons c) quarks d) electrons 5) A(n) ____________________ is a single type of atom. a) compound b) substance c) element d) nucleus 6) A molecule is made up of two or more __________________ bonded together. a) elements b) atoms c) compounds d) liquids 7) What is the orange part with the + on it? a) electron cloud b) nucleus c) electron d) proton e) neutron 8) What is the purple part with the - on it?  a) electron cloud b) nucleus c) electron d) proton e) neutron 9) What is the green part in the center of the model? a) electron cloud b) nucleus c) electron d) proton e) neutron 10) What is the black circular line? a) electron cloud b) nucleus c) electron d) proton e) neutron 11) Which part of the picture represents the chemical symbol? a) 50 b) Sn c) Tin d) 118.711 12) Which part of the picture represents the atomic number?  a) 50 b) Sn c) Tin d) 118.711 13) Water (H 2 O) is an element. a) true b) false 14) NaCl (salt) is considered a compound.  a) true b) false 15) Electrons have no charge. a) true b) false

Atoms, Elements, Molecules and Compounds

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