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“ Element ary, my dear Watson”

“ Element ary, my dear Watson”. One of the most famous movie lines of all time. Quick Review. Matter makes up everything in this room, right? Matter is anything that has mass and volume What is matter made out of?. Elements!. Elements- Building blocks of all matter 118 elements

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“ Element ary, my dear Watson”

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  1. “Elementary, my dear Watson” One of the most famous movie lines of all time

  2. Quick Review • Matter makes up everything in this room, right? • Matter is anything that has mass and volume • What is matter made out of?

  3. Elements! • Elements- • Building blocks of all matter • 118 elements • First 94 occur naturally on earth • Everything we can possibly imagine is made out of these 118 elements • Elements are like the alphabet of everything in our universe. • Periodic table of elements Seaborgium #106

  4. What are elements made of? Bill Nye on Atoms • Atoms-the smallest particle of a substance that can exist by itself. Also considered a vast source of potential energy (E=mc2) • Atoms are made of 3 parts • Protons (found in nucleus) • Neutrons(found in nucleus • Electrons(orbit outside of Nucleus) • Remember, atoms are matter. Matter is anything that has mass and volume. • Atoms have mass; very small mass • Oxygen atom has different mass than Hydrogen atom. MichioKaku on atoms

  5. (not in note packet)You’re not actually touching anything… Don’t believe me? Proof. You’re feeling the repulsive forces of the electrons through your nerves. (1 in 8,000 potassium atoms, is radioactive (K40 or C14))

  6. Atoms • Protons • + charge (protons have mass) • Neutrons • neutral charge (neutrons have mass) • Electrons (e-) • - charge (electrons don’t have mass) • Important!!! #protons=#electrons • Atomic weight=protons+neutrons • Neutrons = (lets figure it out)________ - ___________

  7. Guess the atom

  8. How many electrons in each element shown? • Protons? • Neutrons? • Draw an atomic model for each • The larger the “atomic number”, the larger the atom. (It’s literally bigger)

  9. 4 main groups of elements Alkali metals in water 1. Highly reactive metals • Named “alkali metals” • React strongly with water • Less reactive metals • Named “transition metals and alkali earth metals” • Highly reactive non-metals • Named the “halogens” • Non-reactive gases • Named “noble gases”

  10. Populations Organisms Organs Tissues Cells Cell organelles (nucleus) Macromolecules (proteins) molecules elements atoms

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