Fundamental Particles.

Question 1

19th century what did John dalton discover ?

Answer 1

Atoms are solid spheres
Diff spheres = diff elements

Question 2

In 1897 what did j.j Thomson discover ?

Answer 2

The plum pudding model
( ball of positive charge with elections stuck within it).

Question 3

In 1909 what did Rutherford discover?

Answer 3

Alpha particles deflected therefore positively charged nucleus with a cloud of negative electrons.

Question 4

In 1913 what did Neils Bohr discover?

Answer 4

Electrons orbit the nucleus in fixed shells.

Question 5

In 1932 what did Chadwick discover?

Answer 5

He discovered neutrons.

Question 6

What is under the category of nucleons?

Answer 6

Protons / neutrons

Question 7

Define things that live in the nucleus.

Answer 7

Nucleons

Question 8

What is the relative properties of subatomic particles? -Mass

Answer 8

Proton = 1
Neutron = 1
Electron =1

Question 9

Define isotope ?

Answer 9

An element with the same number of protons but different number of electrons.