Chemistry 215 Unit 2 Test Review - Chemistry 215 Unit 2 Test Review Gabe Rose and Joshua Muldoon Compare and Contrast Atomic Number/Mass Number When

Chemistry 215 Unit 2 Test Review - Chemistry 215 Unit 2...

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Chemistry 215 Unit 2 Test Review Gabe Rose and Joshua Muldoon Compare and Contrast Atomic Number/Mass Number When characterizing elements by the number or protons and we call this the Atomic Number (A) . We can characterize elements by the number of protons and neutrons called Mass Number (Z) . Scientists and their Theory. List the major contribution that each scientist made to Atomic theory. Briefly explain how they made their discovery Rutherford- Discovered the nuclear atom. He shot radioactive particles at a piece of gold foil. Bohr- Bohr believed that electrons could only exist at predetermined distance from the nucleus. Thomson- Came up with the plum pudding model which claims that an atom was a ball of positively charged particles, and that electrons were put in in order to balance them out. Definition Location Relative Charge Relative Weight Symbol Nucleus The center of every atom, which contains the protons and neutrons.
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