1. Identify and describe the particles that make an atom.
OBJECTIVE:
Identify and describe the particles that make an atom.
WARMUP:
What are the 3 particles inside an atom & what charge does each have?

2. VOCABULARY
Protons: small particles in the nucleus of an atom. They have a positive charge.
Neutrons: small particles in the nucleus of an atom. They have no charge.
Electrons: tiny particles of an atom that move around the nucleus. They have a negative charge. + N -

3. How can scientists see atoms?

6. ALSO: Complete BrainPop Activity worksheet
Atoms
ALSO: Complete BrainPop Activity worksheet

7. Science Notes: Periodic Table
Name: Date: Class#:
Science Notes: Periodic Table 1 H
Hydrogen
1.008 atu

8. 1 1 H 1.008 atu Hydrogen Science Notes
Name:
Date: Period#:
This is called the atomic number. It is always equal to the number of protons Also, electrons = protons (Write this in your vocabulary!)
Science Notes 1 1 H
We round this number off to the nearest whole number, so for Hydrogen the mass is 1 atu
Hydrogen
The mass is measured in atomic units = atu
Students add red parts to vocab. section
1.008 atu
This is called the atomic mass and is equal to protons + neutrons. (more vocabulary!)
Atomic Mass - Protons= # of Neutrons (add to 3rd box)

9. 1 1 H 1.008 atu Hydrogen Science Notes
Name:
Date: Period#:
Make your Notes pg. match this slide!
atomic number
= protons
= electrons
Science Notes 1 1 H
Element Symbol
Round this number off to the nearest whole number
Ex:
Element Name
Hydrogen
1.008 atu
atomic units = atu
atomic mass = protons + neutrons
Atomic mass – Atomic # = # of Neutrons
“Nucleus #”

10. 1 H 1 atu Hydrogen Lets draw a hydrogen atom… + = protons = electrons
= protons + neutrons

11. HYDROGEN + Proton (+) Electron (-)
Have students take notes as we draw a H atom together. Then show them the next slide and ask them to tell you what the atomic number/mass would be for Helium.
Electron (-)

12. 2 He Helium 4.003atu Draw a Helium atom = protons = electrons
Have students take notes as we draw a H atom together. Then show them the next slide and ask them to tell you what the atomic number/mass would be for Helium.
Round off to 4 – 2 = 2 neutrons

13. HELIUM
proton
(positive) +
neutron +
(neutral)
electron
(Negative)

14. Draw a Carbon atom 6 C
Carbon
12.011atu

15. C Draw a Carbon atom 6 This ring holds up to 8 electrons.
12.011atu
Draw a Carbon atom

16. CARBON + N

17. CARBON + N N N N N N
Have students take notes as we draw a H atom together. Then show them the next slide and ask them to tell you what the atomic number/mass would be for Helium.

18. Use the following information to draw a sodium atom…11
= 11 protons
= 11 electrons + N Na
Sodium
22.9 atu
= 23 – 11 = 12 neutrons

19. 11 Na Use the following information to draw a sodium atom… Sodium
22.9 atu 11

20. SODIUM ATOM + N N N N N N N N N N N N
Have students take notes as we draw a H atom together. Then show them the next slide and ask them to tell you what the atomic number/mass would be for Helium. N N N N

21. 13 Al aluminum Draw an aluminum atom 26.9 atu =protons = electrons
Round off and subtract atomic mass from it
Review
26.9 atu
27-13 = 14 neutrons

22. 13 Al Use the following information to draw a aluminum atom… Aluminum
26.9 atu 13

23. + N N N N N N N N N N N N Aluminum N N protons = 13 electrons = 13
neutrons = 14
Holds up to 8
Holds up to 8
Holds up to 2 + N N N N N N N N N N
Have students take notes as we draw a H atom together. Then show them the next slide and ask them to tell you what the atomic number/mass would be for Helium. N N N N

24. The Musical Table Of Elements