atomic theory timeline

Question 1

-realized that if you continued to cut something, eventually you would end up with something that couldn’t be cut anymore, “atomos”- meaning not able to divide

Answer 1

democritus 440 bce

Question 2

Democritus’ atomic model

Answer 2

atomism

Question 3

atomism

Answer 3

based on the idea thatall matter is made up of atoms, which are indivisible particles that are always moving and separated by empty space

Question 4

-realized that atoms combine in very specific proportions (ratios) based on mass

Answer 4

john dalton 1803

Question 5

dalton’s model

Answer 5

solid sphere model or bowling ball model

Question 6

smallest particle that n element can be divided and still be the same substance

Answer 6

-atoms:

Question 7

atoms join with other atoms to

Answer 7

form a new substance

Question 8

discovered that there were small particles inside the atom, meaning that atoms can be divided into smaller substances

Answer 8

j. j. thomson 1897

Question 9

negatively charged particles attracted to positively charged particles

Answer 9

electron

Question 10

electrons are mixed throughout the atom, soft blobs of mater

Answer 10

plum pudding model made by j. j. thomson