Subatomic Particles Neutron Proton Electron

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Presentation transcript:

Subatomic Particles Neutron Proton Electron Neutral charge, large mass, located in nucleus Proton Positive charge, large mass, located in nucleus Tells us the type of element (atomic number) Electron Negative change, tiny mass, located around nucleus Electron configurations (1st shell, 2nd shell, etc)

The element represented by the diagram is BORON. #1-5 The element represented by the diagram is BORON.

#6 Atomic Number Symbol Name Atomic Mass

#7-10 The atomic number represents … The atomic mass represents … protons (or electrons if no charge) The atomic mass represents … protons and neutrons  electron mass too tiny You can find the number of protons or electrons in an atom by … Finding the atomic number You can find the number of neutrons in an atom by … Subtracting the atomic number from the atomic mass

#11 – Use your knowledge to practice!

#12 Electron Configurations Maximum number of electrons in each shell 1st: 2 2nd: 8 3rd: 18

#13 Electron Configurations Electrons in the outermost shell or energy level are called VALENCE electrons If outershell has only 1 valence electron, element is likely to lose an electron in a chemical bond If outermost shell needs only 1 more valence electron to be full, element is likely to gain an electron in a chemical bond If outermost shell is full, element is not likely to react with other elements

Watch Ms. Smith do #14 then complete #15-16 on your own.