1) Which subatomic particle did Thomson discover? Answer: 82 2) What did Bohr call his model of the atom? Answer: 17 3) Who used a cathode ray tube to make a discovery? Answer: +1 4) If an element had three isotopes in the following relative abundance, what would the atomic mass of the element be? 60.00% 70.00 amu 35.00% 68.00 amu 5.00% 72.00 amu Answer: Democritus 5) What experiment did Rutherford used to develop his atomic model? Answer: no mass 6) How many protons does Carbon have? Answer: 13 7) How many electrons does a neutral atom of Nitrogen have? Answer: Electron 8) Which of Dalton’s ideas of the atom were wrong? Answer: atomic number 9) What causes an atom to have a positive charge? Answer: Plum Pudding 10) Which subatomic particles make up the nucleus of an atom? Answer: 20 11) What causes an atom to have a negative charge? Answer: the periodic table 12) What is the charge on a proton? Answer: the nucleus 13) What is the charge on an electron? Answer: All atoms have the same mass and are indivisible. 14) What is the charge on a neutron? Answer: 8 15) What is the mass of an electron? Answer: 100 16) If I add protons and neutrons together, what do I get? s Answer: 69.40 a.m.u 17) What is the number of protons equal to? Answer: Gain of Electrons 18) What do Isotopes have differing numbers of? Answer: Thomson 19) Who had the FIRST idea about an atom? Answer: Lost of electrons 20) What is the mass of an atom that has 45 protons, 47 electrons and 55 neutrons? Answer: protons and neutrons 21) What did Thomson call his model of the atom? Answer: no charge 22) What did Rutherford discover? Answer: Gold Foil Experiment 23) How many protons does Lead (Pb) have? Answer: 6 24) How many electrons does a neutral atom of Chlorine (Cl) have? Answer: 7 25) How many neutrons does Carbon-14 have? Answer: -1 26) How many neutrons does Chlorine-37 have? Answer: Planetary Model 27) How many protons does Aluminum (Al) have? Answer: Atomic Mass 28) Where can we find ALL the elements? Answer: Neutrons