2. Physical Science Mr. Bythwood

3. Protons (+): Atomic Number Neutrons: Atomic Mass minus Protons Electrons (-): Same number as Protons

4. Protons (+): Atomic Number Neutrons: Atomic Mass minus Protons Electrons (-): Same number as Protons

5. Protons (+): Atomic Number Neutrons: Atomic Mass minus Protons Electrons (-): Same number as Protons

6. Atomic Particles ParticleLocation Mass in amuCharge Proton Neutron Electron

7. Atomic ParticlesParticleLocation Mass in amuChargeProton Neutron Electron What is amu???? amu is short for atomic mass unit 1 amu = 1.66053886 × 10 -27 kilograms EXAMPLE: If you weigh 150 lbs, what is that in kilograms? 1 kg = 2.2 lbs 150 lbs 2.2 lbs 68.2 kg 1 kg EXAMPLE: If you weigh 150 lbs, what is that in amu? 68.2 kg 1.66 x 10 -27 kg 1 amu 4.11 x 10 +28 amu

8. Atomic Particles ParticleLocation Mass in amuCharge Proton Neutron Electron Nucleus Cloud 1 1 0 +1 0

9. Atomic Inventory ElementSymbolAtomicNumber Mass Number ProtonsNeutronsElectrons He Mg Fe Ar 2 12 26 18 4 24 56 40 2 12 26 18 2 12 30 22 2 12 26 18 Helium Magnesium Iron Argon

10. Atomic Inventory ElementSymbolAtomicNumber Mass Number ProtonsNeutronsElectrons Zn Br Al U 30 35 13 92 65 80 238 30 35 13 92 35 45 14 146 30 35 13 92 Zinc Bromine Aluminum Uranium 27

11. Atomic Inventory ElementSymbolAtomicNumber Mass Number ProtonsNeutronsElectrons Na Kr Ca Ag 11 36 20 47 23 84 40 108 11 36 20 47 12 48 20 61 11 36 20 47 Sodium Krypton Calcium Silver

12. The End  This presentation was created for the benefit of our students by the Science Department at Howard High School of Technology  Adjustments made by Mr. Madigan and Mr. Spraggins  Please send suggestions and comments to rmay@nccvt.k12.de.us