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Chapter 4 Atoms

Teacher: L. Neihouse
Across
Where electrons are most likely to be.
Neutral particle
Came up with 1st atomic theory.
What the mole number is called.
Particle of light
Equal to 1/12 of mass of carbon 12 atom.
Used in semiconductor chips.
Negative particle outside of nucleus
Positive subatomic particle.
Number of protons and neutrons added together.
Down
Discovered the proton.
Said electrons traveled in orbits around the sun.
Electrons in the outermost shell of an atom.
Number of protons in an atom.
Discovered the electron.
Used in nuclear medicine.
A collection of a large number of particles.
Same proton number - different neutron number.
Center of atom
Said atoms were indivisible