Chem unit 2

Question 0

Thomson

Answer 0

He proposed the “plum pudding” model with electrons stuck in a positive dough.

Question 1

Dalton

Answer 1

Revives atomic theory in modern times. All things are composed of tiny individual particles called atoms.

Question 2

Rutherford

Answer 2

Conducted “gold foil” experiment concluding the positive charge was central in a dense nucleus. Most if the atom is empty space.

Question 3

Bohr

Answer 3

Organized electrons in orbits. Bohr devised a model that is typically drawn by introductory chem students.

Question 4

4 Main Points of Dalton’s Atomic Theory

Answer 4

1) All matter is made of atoms, which are indivisible/indestructible.
2) All atoms of given elements are identical in mass and proportion.
3) Atoms of a particular element are unique and therefore different from all other elemental Forms.
4) Atoms join to form compounds in a whole number ration.