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Chapter 17 part a

Properties of the atoms and the periodic table

QuestionAnswer
WHat is matter made up of? atoms
What does atom mean? unable to be divided
What do find when you break apart an atom? Protons,neutrons,electrons
What does an atoms nucleus contain? Protons and neutrons
Where are electrons found? the space around the nucleus
What is the electron charge? negative
what is the neutrons charge? neutral
what is the protons charge? positive
What is a Quark? Protons and neutrons that are made up of smaller particles
Who is democritus? Thought that matter couldnt be divided equally
Who is Aristotle? Matter was made up of 4 elements
Who is dalton? He thought that atoms were tiny hard spheres, all matter is made up of atoms.
Who is thompson? discovered electrons, plum pudding model
what is atomic number? number of protons an atom contains
What is mass number? equal to the total number of protons plus the neutrons.
what is atomic mass? average of all known isotopes of an element
What is an energy level? electrons that are arrange into it, and they hold a specific number
How many electrons can each hold? 2,8,18,and 32 electrons
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