Atomic Theory

Use the websites to help you answer the questions.

http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch6/index.php

1.How do you find protons?

2.How do you find neutrons?

3. How do you find electrons?

http://www.chem4kids.com/files/atom_isotopes.html4.

4. What's an Isotope?

http://atomictimeline.net/

5. What did each scientist discover.

-Empedocles-

-Democritus-

-Antoine Lavoisier-

-Joseph Proust-

-John Dalton-

-William Crookes-

-J.J Thomson-

-Ernst Rutherford-

-James Chadwick-

Neils Bohr-

-Erwin Schrodinger-

1. atomic number

2. subtract the number of protons from the mass number

3. If neutral, the number of electrons are the same number of protons

4. contains the same number of protons but different number of neutrons; have the same atomic number but a different mass.

5. 

-Empedocles- classical elements theory

-Democritus- atom

-Antoine Lavoisier- Law of Conservation of Matter

-Joseph Proust- Law of Definite Proportions

-John Dalton- Atomic Theory

-William Crookes- cathode ray tubes

-J.J Thomson- electrons

-Ernst Rutherford- nucleus and protons

-James Chadwick- neutrons

-Neils Bohr- Quantum Model of an Atom/ Bohr Model

-Erwin Schrodinger- Quantum Mechanical Model