1. Atomic Structure

2. Matter
Matter makes up everything in the universe. Matter is composed of atoms. EVERYTHING is made up of atoms. Atoms are the language of the universe!

3. Atomic Theory - History
J.J. Thompson
1897
Niels Bohr
1913
Modern Quantum Cloud Model
Democritus BC – John Dalton 1803
Ernest Rutherford 1912

4. Bohr vs. Modern Quantum Cloud

5. What is an atom made of?
What is smaller than an atom? A quark is a small particle that makes up the “pieces” of an atom. These particles, also known as nucleons and quarks, were discovered by nuclear chemists and physicists using a particle accelerator.

6. Quarks? What are those?! Down Up Strange Proton Charm Top Bottom
Neutron

7. Atomic Structure
Proton – Positively charged particle in the nucleus of an atom. Neutron – Particle within the nucleus of an atom with a neutral charge. Electron – Negatively charged particle that orbits the nucleus of an atom.

8. Atomic Structure
Protons (+) and Neutrons (n) make up the nucleus of an atom. Therefore the nucleus of an atom has a positive charge. The Atomic Number is the amount of protons in the nucleus.

9. Atomic Structure
Electrons are the smallest piece of an atom and orbit the outside of an atom’s nucleus. Electrons equal the number of protons in order to stabilize the atom. How many electrons do you think an Atom of oxygen contains?

10. Electron Configuration
+ 8
n 8
Oxygen

11. Atomic Structure Each orbital shell can only contain so many electrons-
x 18 -
Formula:
2 𝑛 2
n = shell number
x 8 -
x 2 n +

12. Practice
Can you draw the atomic structure of the following elements?

13. Practice for homework
On the following slide click “Build an Atom Game” Click the “Atom” picture You are now in the game Create and draw as many of the stable atoms as you can. ( At least 6 )

14. Chemistry for Kids Khan Academy Build an Atom Game Atoms app game
Resources
Chemistry for Kids Khan Academy Build an Atom Game Atoms app game

15. How to draw a Bohr Model of the atom//