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Warm up 2/18/13

Warm up 2/18/13. Draw a picture of what an atom looks like. Label as many parts as you can. Give example of types of atom?. Atom. Atom. Unit EQ:How is periodic table arranged? Subatomic particles?. Warm-up 10/1/13

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Warm up 2/18/13

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  1. Warm up 2/18/13 • Draw a picture of what an atom looks like. • Label as many parts as you can. • Give example of types of atom?

  2. Atom

  3. Atom

  4. Unit EQ:How is periodic table arranged?Subatomic particles? Warm-up 10/1/13 • How many protons, neutrons and electrons does Thorium-232 and Thorium-236 have?

  5. Unit EQ: How is Periodic Table arranged? Warm-up • What does the word periodic/period mean to you? • Open book to p158 • Get 3 colored pencils out of drawer repeating in a predictable pattern

  6. Unit EQ: How is Periodic Table arranged? Three main classes of elements Then within those 3 18 groups (columns) 7 periods (rows) Metal metalloids non-metals

  7. Calculating subatomic particles • Atomic number (Z)= # protons = # electrons • Atomic Mass (A)– weighted average -atomic mass equal to # of protons plus # of neutrons in nucleus • Mass number = protons + neutrons for specific isotope • Isotope – atom of same element with different # of neutrons and therefore different mass numbers.

  8. Unit EQ: How is Periodic Table arranged? Mendeleev – 1869 (russian) arranged elements according to atomic mass. 1st periodic table He left blanks in table –predicted presence of unknown elements – Awesome! Lothar Meyer – a little late Moseley – 1913 (british) made slight change and arranged by atomic number. Modern periodic table

  9. Ticket out the Door 10/8 1)How many protons does Yttrium-90 have? 2) How many electrons in Y-90? 3) How many neutrons in Y-90? 4) Who is given credit for discovering the nucleus? 5) Which of the following is a metalloid? sodium , silicon, nitrogen 6) Which of the following is a non-metal? boron , sulfur, nickel 7) What group is germanium in? 8) What period is germanium in?

  10. RedoTicket out the Door • Convert the following to scientific notation 1) 237,000 2) 50000 3) 0.00000045 Convert units – write units with #’s 4) 14 millimeters to meters 5) 50,000,000 milliliters to kiloliters 6) What is the density of a 75g sample that occupies 3.5cm3 space?

  11. Define • mixture – • solution- • homogeneous – • heterogeneous – • compound • element • substance uniform/same throughout different throughout

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