Chapter 4

Question 1

Whose work is credited with being the beginning of modern atomic theory?

Answer 1

Dalton

Question 2

Who’s Aristotle?

Answer 2

Greek philosopher, believed atoms move through space. Didn’t believe in empty space

Question 3

What did Aristotle say matter was made up of?

Answer 3

Earth, fire, air, water

Question 4

What was dalton so atomic theory?

Answer 4

Matter was made up of atoms.
Atoms are indivisible and indestructible.
Atoms make up elements.
Atoms of elements are different of other elements.
Atoms can be combined or rearranged.

Question 5

What is the size of an atom?

Answer 5

10^-10 m

Question 6

Gamma has what charge?

Answer 6

Neutral

Question 7

Alpha has what charge?

Answer 7

Positive

Question 8

Beta has what charge?

Answer 8

Negative

Question 9

What’s the cathode-Ray tube?

Answer 9

Used to study relationships between mass and charge

Question 10

What charge does cathode have?

Answer 10

Negative

Question 11

What charge does anode have?

Answer 11

Positive

Question 12

What are electrons?

Answer 12

Negatively charged particles

Question 13

What was Rutherfords experiment?

Answer 13

Used narrow beam of alpha particles aimed at thin sheet of gold foil. It reflected off of foil.

Question 14

Nucleus

Answer 14

All atoms positive charges (almost all its mass) were contained in the center of an atom. Rutherford concluded it..

Question 15

Atomic mass unit

Answer 15

Based off of carbon-12, 1/12 of the mass of carbon-12

Question 16

Who originally proposed the concept that matter is composed of tiny, indivisible particles?

Answer 16

Democritus