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Warmup (5 minutes) *see if you can attack the following questions already!!!!

1) How many protons are there in 1 atom of sulfur? 2) Which if the following elements below has 24 protons? A. bismuth B. chromium C. cadmium D. All of these. 3) How many neutrons are there in most boron atoms? 4) The atomic mass of an atom is mostly due to the mass of its:

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Warmup (5 minutes) *see if you can attack the following questions already!!!!

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  1. 1) How many protons are there in 1 atom of sulfur? 2) Which if the following elements below has 24 protons? A. bismuth B. chromium C. cadmium D. All of these 3) How many neutrons are there in most boron atoms? 4) The atomic mass of an atom is mostly due to the mass of its: A. protons only B. neutrons only C. protons and neutrons D. protons and electrons E. none of the above Warmup(5 minutes)*see if you can attack the following questions already!!!!

  2. Atomic Structure

  3. The nucleus of the atom is TINY relative to the total volume of the atom, yet contains most of the mass!!!!!! Analogy Football Field 99.9% of the VOLUME of the atom is taken up by e-orbiting the empty space around the nucleus, while only 0.1% of volume is the nucleus 99.9% of the MASS of an atom is densely packed in the tiny nucleus, while the other 0.1% of the mass is from the mass of the electrons Outer Edge of Atom Nucleus

  4. Subatomic Particle Details

  5. Subatomic Particle Details 1 proton is actually 0.00000000000000000000000167 grams! 1 amu = 1.67 x 10-24 grams

  6. Subatomic Particle Details

  7. Subatomic Particle Details

  8. Subatomic Particle Details

  9. 11 protons 12 neutrons 11 electrons + o o o o + + + o o + o + + o + + o o + + o o The PT shows the recipe for atoms of every element # protons = atomic # = element identity • protons + neutrons = mass number Atomic # 11 Na Sodium 22.99 (orbiting nucleus) Average Atomic Mass • Atoms have a neutral charge when the # of protons (+) = # of electrons (-)

  10. 8 O Oxygen 16.00 10 Ne Neon 20.18 Changing the contents of an atom What happens if we: 1. Add 2 protons to O? - light for signs, nothing to breathe 2. Add 2 neutrons to O? - increase mass, less stable, radioactive - new isotope of oxygen 3. Add 2 electrons to O? - ion with -2 charge

  11. Practice Helium He 2 2 2

  12. What elements are these? HYDROGEN-1 HYDROGEN-2 HYDROGEN-3 These are all ISOTOPES: the same element (same # protons) but they are just different versions of that element (different number of neutrons).

  13. isotope notation: 3 H Hydrogen - 3 Element Name Mass Number Atomic # # p & n # of protons # of electrons

  14. Practice Give the name for the isotope’s nucleus to the right. Include the mass number! ANSWER: Carbon – 14

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