Scientists

Question 0

Where is Rutherford from?

Answer 0

New Zealand

Question 1

Rutherford years

Answer 1

1887-1937

Question 2

What is the Gold Foil Experiment?

Answer 2

Prove something empty by putting something through it
Thin gold sheets to not absorb bullet=target atoms
Small particle is bullet with high energy=alpha particles
Electrons affect it
Most alpha particles through but some deflect

Question 3

What is Rutherford’s model of the atom?

Answer 3

Nucleus-dense positive Center almost entire mass of atom (v=1/10 trillionth of an atom)
Positive charge balances negative charge
Electrons surround nucleus

Question 4

What is the modern nuclear structure?

Answer 4

Nucleus composed of protons and neutrons
Protons number=electrons number
Neutrons have no charge, mass a little more than a proton, and discovered by Chadwick in 1932

Question 5

J.J. Thomas’s Experiment

Answer 5

Used a cathode ray tube to study electricity
“Crookes” tube
Ray made of tiny negatively charged particles called electrons
Smaller than hydrogen atoms
Atoms divisible
Atoms have same electrons
Net charge 0 so pose and negative charge the same

Question 6

What is an electron?

Answer 6

Tiny and light compared to an atom
Negatively charged
Move fast

Question 7

Explain J.J. Rutherford’s plum-pudding model

Answer 7

Cloud of positivity
Atoms divisible
Internal structure
Electrons in positive field 
Positive and negative charge the same
Atom "empty space"

Question 8

What is Dalton’s Atomic Theory?

Answer 8

Elements composed of atoms
Tiny, hard, unbreakable, and spheres
All atoms of one element the same
Atoms of one element different from another element
Atoms of one element form with atoms of another element to form compounds
Law of Multiple Proportions-all samples of a compound contain same proportions in mass of the elements
Atoms indivisible in chemical process
Present at beginning then present at the end
Rearranged
Atoms of one element cannot change into atoms of another element

Question 9

What is the purpose of the electron?

Answer 9

Determines chemical behavior because electrons participate in bonding

Question 10

What us the purpose of the proton?

Answer 10

Determines the identity of the atom

Question 11

What is the role of the electron?

Answer 11

Stabilize the nucleus or hold it together