Atomic Theory Study Sheet

Atomic Theory-Study Sheet-Updated 9/15

*Reminder-Review Notes and this Question/Answer sheet DAILY to prepare for your next test. Goal: Grade of “A”.

*Flash Review….Test October 7th

How to use this study guide-Print the page and fold between questions and answers OR cover the answer column. Ask yourself the questions and see if you can correctly answer. Use it until you can answer ALL questions quickly with 100% accuracy. Do a little every day, and you will be ready for the next test!

History of Atomic Theory (9/13)

Answers: Questions:

Dalton First scientist to propose a model of the atom

Atom Smallest unit of matter

Element Substance made of multiple identical atoms

Dalton’s incorrect theory The
Negligible (too small to count) What is the mass of an electron?

1 AMU or g What is the mass of a neutron?

Increasing atomic number Elements on the periodic table are arranged in order of …

# of electrons = # of protons What is the relationship between protons and electrons?

2 How many electrons can the first orbital or shell hold?

8 How many electrons can the second orbital or shell hold?

9/15

Atom An … has the same number of protons, neutrons, and