E- P+ NO Oh My!.

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Reviewing Subatomic Particles

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Presentation transcript:

e- P+ NO Oh My!

Particle Proton electron Neutron Symbol Where Charge Mass

He Helium 4.00260 Atomic Number 2 Atomic Mass Number of Protons Number of electrons Number of Protons + Neutrons Atomic Mass

Protons Electrons Neutrons Na Os Rn U

Isotopes and Ions Since the number of Protons can’t change, what about the number of electrons or neutrons? Yup – You can change the number of Neutrons- which changes the mass, and some properties – these different massed atoms of one element are called Isotopes. Famous Isotopes – U-235, C-14, Pu-239, Po-210

C-14 C-12 U-238 U-235 H-1 (hydrogen) H-2 (deuterium) H-3 (tritium) Protons Electrons Neutrons C-14 C-12 U-238 U-235 H-1 (hydrogen) H-2 (deuterium) H-3 (tritium)

Danger – math weirdness What about changing the number of electrons? Adding or Subtracting Danger – math weirdness If you add electrons – the number is negative, if you subtract electrons, the number is positive. Atoms with this “problem” – not neutral – are called Ions

Protons Electrons Neutrons F- Na+ Cl- O-2 Al+3 Ba+2

Atomic Mass Average mass of all the isotopes as they exist on Earth

Put in the information for the 3 subatomic particles Particle name Symbol Charge Location in atom Mass

Elements, Isotopes and Ions - Oh My!!! Protons Electrons Neutrons C Au U-238 F- Na+ Al+3 U-235+6

Disclaimer Aloha I put together these power points for use in my science classes. You may use them in your classes. Some images are public domain, some are used under the fair-use provisions of the copyright law, some are mine. Copyright is retained by the owners! Ted Brattstrom