Ch. 3 Notes

The 2,400-year search for the atom - Theresa Doud (Video, 5:22)

https://www.youtube.com/watch?v=xazQRcSCRaY

Models of the Atom Throughout History (Video, 9:01)

https://www.youtube.com/watch?v=thnDxFdkzZs

Lesson 11

Simple Atomic Model Drawing Tutorial https://www.youtube.com/watch?v=lJg3HJFpO00

*The narrator draws the pairs of electrons in the first energy ring right next to each other. This is different from what we discussed, but is also correct.

*The narrator also takes the mass number from the PT. The mass numbers you will use will be in the name of the element you are drawing. For example, Carbon-14 has a mass of 14 (even though this is different from what the periodic table says).

PHET Build an Atom

https://phet.colorado.edu/en/simulation/build-an-atom

PHET Build and Atom --> Atom

1.What are the 3 subatomic particles? What are their respective properties?

2.Which subatomic particle gives an element its identity?

3.Which subatomic particle determines if an element is neutral or an ion?

4.What makes an element a positive ion? A negative one?

5.What must happen for an element to have a net charge of zero?

6.What makes an element stable or unstable?

Stay in the "Atom" simulation. All of the following questions refer to nitrogen.

7.How many protons does it ALWAYS contain?

8.How many neutrons can it have and still be stable?