Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/7

Click to flip

7 Cards in this Set

  • Front
  • Back
democritus
atom=smallest possible particle of matter
daltons atomic theory
1/elements made of indivisable
particles called atoms.
2/atoms same element=identical
atoms diff.element=differnt
3/atoms combine chemically in small whole #ratios form comp.
4/chemical reactions,atoms joined,sep,rearragned,but atoms never change atoms of diff.element
thomson
exp.w/flow of electricity, sealed gases in glass tubes w/
metal disk &electrodes.<-conn.
high voltage elec.
1=pos charged 1=neg charged
rutherford
plum pudding model, ex.thin gold sheet
-most of atom=empty space
-very dense, very small
electonegativity bonds
0.0-0.4=nonpolar
0.5-2.0=polar covalent
2.1 ^ =ionic bond

if a molecule contains polar bonds and is symetrical...
it is a nonpolar molecule
if molecules contain polar bonds and Not symetrical...
molecule=polar