ATOMIC THEORY REVIEW

ATOMS !!! What are the 3 subatomic particles?

Protonsneutronselectrons

What is ALL matter made of?

What are the charges of the subatomic particles?

protons (+)positive

neutrons (0)neutral

electrons (-)negative

We know that there are the same number of p+ and e- in atoms on the Periodic Table… So What is the overall charge of any atom?

The overall charge of any atom is

NEUTRAL… the positive charge cancels out the negative charge = 0!!!

What are the masses (amu) of the subatomic particles?

p+ = 1amu

n = 1amue- = 0 amu

1.66 x 10-27 kg = 1 amu

What is this AMU stuff?????

Atomic mass unit (AMU)

2.2 lbs= 1 kg

What are the two areas of an atom?

Nucleus and electron cloud

Where are the p+, n, and e- located in an atom?

p+ in the nucleus

n in the in nucleus

e- in the electron cloud

NucleusWhere is ALL the mass in an atom located?

Where is most of the volume of an atom located?

Electron Cloud

The nucleus contains the p+ and n… while the electrons “orbit” the nucleus in the energy rings of the e- cloud.

What does a Bohr model of the atom look like?

Click icon to add picture

So what are the charges of the different areas?

1. So what is the overall charge of the nucleus?

Positive

2. So what is the overall charge of the electron cloud?

Negative

QUICK REVIEW- ATOMS

Sub-atomic particles:.

particles charge amu location abbrev.

Protons

Electrons

e-

Neutral (0)

+ p+nucleus

0

1

1

neutrons

Electron

cloud_

nucleus

no

protons, neutrons, and electronsnucleus and electron cloudParts of the atom:

Energy Levels of the Atom

8 e- 2e- 32e-

8 e-

18 e-

18 e- 32e-

The Nucleus

P+ N0

1st

shell7th

shell2nd

shell3rd

shell4th

shell5th

shell6th

shell

Atoms can have several energy levels. Sometimes they are also called energy rings, shells or orbits.

Lets take a look at the Periodic Table!

Burning Hindenburg

Burning Hindenburg

Bohr Model Practice1. H

2. Be3. Na4. K5. Rb

6. He7. F8. Cl9. Br10. I

More Bohr Model Practice1. Fr 2. Te3. Sn

4. Cs5. Kr

6. At 7. Ga8. Rn9. Ag10. W

What Bohr model patterns are you starting to see develop? Periodic Table Patterns

The atomic number is the same number as the number of protons and electrons.

Atoms get larger as you move down and two the right on the periodic table.

As you move from left to right on the periodic table, you gain protons and electrons and neutrons.

As you go down from the periodic table, the atom gains another energy shell or orbit.

Valence ElectronsValence electrons are electrons in the

outermost shell of an atom. They determine whether the atom will

bond with another atom.How many valence electrons does lithium have here?

1 valence electronCircle the valence electronsFrom your warm up.