1) Matter is made up of ... a) atoms b) solar system c) science 2) ___________ of the same element are alike.  a) atoms b) tools c) experiments d) ideas 3) Atoms of different elements have different ________ a) colors b) masses c) smells 4) Atoms of different elements join to form a) nucleus b) objects c) compounds 5) Atoms cannot be subdivided. (is this true?) a) True b) False 6) The center of an atom is called the a) proton b) nucleus c) electron d) compound 7) This scientists described the motion of electrons around the nucleus.  a) Democritus b) Dalton c) Nogaoka d) Bohr 8) Thompson saw Dalton's model and also saw negative charge on it. What is this negative charge called? a) nucleus b) electron c) proton 9) Who had the "plum pudding" model? a) Aristotle b) Dalton c) Thompson 10) The scientist Nogaoka said that the atom is like the _________ a) solar system b) plum pudding c) the four elements 11) Who described the motion of electrons around the nucleus? a) Dalton b) Bohr c) Thompson d) Aristotle 12) What is the positive charge in the nucleus called? a) atom b) mass c) electron d) proton

Atomic Theory 2

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