C1-Particles

Question 1

1.) What are the three states of matter?

Answer 1

Solid, Liquid and water

Question 2

2.) Describe the experiment carried out by Rutherford, Geiger and Marsden.

Answer 2

They fired positive alpha particles at an extremely thin piece if gold foil they expected them to go straight through but some were deflected by the positive nucleus as the charge wasn’t spread out.

Question 3

3. ) What did …do:
   a. ) Dalton
   b. ) Thomson
   c. ) Chadwick
   d. ) Bohr

Answer 3

a. ) described atoms as solid spheres different spheres are different elements.
b. ) Described atoms as a positive pudding with negative currents.
c. ) Discovered the neutron
d. ) Discovered that electrons are in shells and have fixed energies and orbits.

Question 4

4.)Why isn’t the particle theory model perfect?

Answer 4

Because tiny spheres aren’t representative of actual atoms you can’t tell the size or the space between the particles and you don’t know how strong they are.

Question 5

5.) Draw a diagram of the atom. Label the nucleus and the electrons on your diagram.

Answer 5

Insert Image

Question 6

6.) What is the mass n.o and what is the atomic n.o and where are they located?

Answer 6

The mass n.o is the total n.o of protons and neutrons it is the top number. The atomic n.o is the number of protons it is at the bottom.

Question 7

7.) What are isotopes?

Answer 7

They are atoms of the same element which have a different number of neutrons but the same number of protons.