Chapter 2 - Models of the atom

Question 1

What was the earliest model?

Answer 1

Greek model

Question 2

What does atomos mean?

Answer 2

Greek word for uncut

Question 3

What did the greek model state?

Answer 3

That matter was made up of small, hard, spherical indestructible particles called atoms

Question 4

Outline what John Daltons theory stated (7)

Answer 4

1. All matter is composed of atoms
2. atoms cant be subdivided or changed into one another
3. atoms cant be created or destroyed
4. all atoms of the same element are same in shape, size, mass
5. all atoms of one element differ from other atoms of other elements
6. atoms combine in small number ratios

Question 5

What does a gas discharge tube consist of?

Answer 5

a sealed glass tube containing gas, 2 metal electrodes (anode and a cathode) and a source of electricity

Question 6

What particles were discovered from using the gas discharge tube?

Answer 6

electrons and protons

Question 7

what is the atomic mass and charge of an electron

Answer 7

0.000 u and a charge of -1

Question 8

what is the mass and charge of a proton

Answer 8

1.0073 and a charge of equal