1. Atomic Structure

2. Subatomic Particles ParticleSymbolChargeRelative mass location proton

3. Subatomic Particles ParticleSymbolChargeRelative mass location ProtonP+Positive + nucleus Neutron

4. Subatomic Particles ParticleSymbolChargeRelative mass location ProtonP+Positive + nucleus Neutron NNeutralnucleus

5. Subatomic Particles ParticleSymbolChargeRelative mass location ProtonP+Positive + nucleus Neutron NNeutralnucleus Electron

6. Subatomic Particles ParticleSymbolChargeRelative mass location Proton P+Positive + nucleus Neutron NNeutralnucleus Electron e-Negative - In orbits

7. What do atoms look like?

8. Atom structure

9. Atomic Number The number of PROTONS in the nucleus. Atomic Number = _____________

10. Atomic number This determines the PROPERTIES of an element. Carbon is carbon because it has 6 protons or an atomic number of ______.

11. Elements of the periodic table go in order of increasing ATOMIC NUMBER.

12. Mass Number Proton mass= ________ Neutron mass= _______ Electron mass= _______ Mass Number = number of PROTONS+ number of NEUTRONS.

13. On the periodic table, info looks like this: 6 C Carbon 12.0107

14. Tips for analyzing an atom How do you know how many protons an atom has? Look for the ATOMIC NUMBER on the PERIODIC TABLE.

15. How to know the number of electrons Neutral atoms have the same number of PROTONS (+) and ELECTRONS (-)

16. How to find the number of neutrons Find your MASS NUMBER Find the number of PROTONS Mass # - # Protons= # Neutrons