Review from last class What is: An atom? An element? A molecule?

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Presentation transcript:

Review from last class What is: An atom? An element? A molecule?

Review from last class

Review from last class If this soccer ball were the nucleus of an atom, how far away would the nearest electron be?

Atoms are mostly empty space. What can we conclude from this? Atoms are mostly empty space.

How to read a periodic table element 3 Atomic number Li Element symbol Element name Lithium 6.941 Atomic mass

Name that element! (and give its atomic #) C Copper (#6) O Oxygen (#8) Fe Iron (#26) Br Bromine (#35) Cu Copper (#29) Pb Lead (#82) Ag Silver (#47)

Give the symbol! (and give its atomic #) Helium He (#2) Sodium Na (#11) Gold Au (#79) Potassium K (#19) Chlorine Cl (#17) Arsenic As (#33) Iodine I (#53)