Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
5 Cards in this Set
- Front
- Back
what was daltons atomic theory?
|
-atoms make up elements
-all atoms in a element are identical -every element has different atoms -atoms form 1 element and it can combine w/ another to form compounds -atoms are not destroyed in chemical reactions |
|
what was thomsons experiment?what did it prove?
|
-atoms of an element can give of tiny negative particles
-all atoms contain negative particles (electrons) -atoms must have positive charges so they can balence the electrons. |
|
what was the plum pudding?
|
-atom might look like a pudding with raisins in random places
-pudding=positive charge -raisins=electrons -electrons balance out |
|
Rutherfords experiment
|
his theory was that an atom has a positive charge somewhere in the atom(nucleus and its in the center)
what he did was he "shot" positive charges to a gold atom -some would go right through the atom but some would bounce back. he determined that their was a circle in the middle of an atom that had a positive charge because positive and postivie regect. |
|
the bohr model
|
an atom looks like
- small w/ a nucleus in the middle and electrons orbiting around like the solar system -the electrons move in a circular motion -electrons could jump to a different orbit by recieving or giving light -his model was wrong because electrons do not move around the nucleus in a circular motion |