Atomic Theory

Question 1

Greeks

Answer 1

-atoms = uncuttable
-proposed that matter was made of tiny indivisible particles
-coined the term ‘atom’

Question 2

Dalton

Answer 2

-matter consists of indivisible atoms
-atoms arrange in different combos to make different compounds
-solid sphere (same throughout) that is indivisible like a jawbreaker

Question 3

Thomson

Answer 3

-discovered atoms have electrons
-electrons smaller than atoms and dispersed throughout the entire atom
-used cathole ray experiment to prove his theory
-plum pudding model

Question 4

Rutherford

Answer 4

-discovered atoms have a nucleus
-dense nucleus was surrounded by negative electrons
-used the gold foil experiment to make his model of the atom
-

Question 5

Bohr

Answer 5

-electrons were like planets, spinning around the nucleus in energy levels
-moved at a fixed distance from the nucleus

Question 6

Modern Theory

Answer 6

-electrons don’t orbit around, they sketch around it or in a ‘cloud’