Take Out Science notebook open to homework Catalyst sheet Pencil

Catalyst 16 S Sulfur Atomic Number: Protons: Neutrons: Electrons: Element Symbol: Element Name: State of Matter: Atomic Mass: Element type:

Energy Levels The electrons swirl around the nucleus at certain average distances from the nucleus (the protons and the neutrons) in the electron cloud The areas where the electrons travel are called energy levels.

Why do you think there are two electrons on the inner ring and three on the outer ring?

Only a certain number of electrons can be held in an energy level.

Yellow Brick Road

Energy Level (n)Electron Capacity (2n 2 ) The maximum number of electrons that can occupy a specific energy level can be found using the following formula: Electron Capacity = 2n 2 The variable n represents the number of the energy level in question. Keep in mind that an energy level need not be completely filled before electrons begin to fill the next level.

13 Al Aluminum Atomic Number: Protons: Neutrons: Electrons: Element Symbol: Element Name: State of Matter: Atomic Mass: Element type: Electron Configuration: Green = Nonmetals Yellow = Metals Blue = Transition Metals Orange = Noble Gases

1s 2 2s 2 2p 6 3s 2 3p 1 How many electrons does Al have in each energy level? 1 st energy level: 2 nd energy level: 3 rd energy level:

Write the electron configuration for Carbon Draw a Bohr model of Carbon 6 C Carbon

Homework Complete electron configuration practice on page 44 of science notebook Atomic structure quiz on Friday

Take Out Science notebook open to homework Catalyst sheet Pencil

Write/draw 4 ways to illustrate an atom of the element Antimony (presume a neutral atom) Element Name: Element Symbol: Electron Configuration: Bohr Model: 51 Sb Antimony Catalyst

Valence Electrons Valence electrons are electrons that are in the outer most level of the electron cloud They are always found in s & p orbitals How many valence electrons does Aluminum have?

1s 2 2s 2 2p 6 3s 2 3p 1

Electron Dot Notation Al

Valence electrons 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 4d 10 5s 2 5p 3 Number of valence electrons (in the last s and p orbitals) Electron dot notation: Sb 51 Sb Antimony

Homework Complete “5 Ways to Represent an Atom” on page 47 of science notebook Atomic structure quiz on Friday

Take Out Science notebook open to homework Catalyst sheet Pencil

Write/draw 5 ways to illustrate the element to the left (presume a neutral atom) Element Name: Element Symbol: Electron Configuration: Bohr Model: Electron Dot Notation: 6 C Catalyst

1s 2 2s 2 2p 2 Number of valence electrons (in the last s and p orbitals) Electron dot notation: C 6 C Carbon

Write/draw 5 ways to illustrate the element to the left (presume a neutral atom) Element Name: Element Symbol: Electron Configuration: Bohr Model: Electron Dot Notation: 15 P

1s 2 2s 2 2p 6 3s 2 3p 3 Number of valence electrons (in the last s & p orbitals) Electron dot notation: P 15 P Phosphorous

Write/draw 5 ways to illustrate the element to the left (presume a neutral atom) Element Name: Element Symbol: Electron Configuration: Bohr Model: Electron Dot Notation: 19 K

1s 2 2s 2 2p 6 3s 2 3p 6 4s 1 Number of valence electrons (in the last s orbital) Electron dot notation: K 19 K Potassium

Write/draw 5 ways to illustrate the element to the left (presume a neutral atom) Element Name: Element Symbol: Electron Configuration: Bohr Model: Electron Dot Notation: 54 Xe

1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 Number of valence electrons (in the last s & p orbitals) Electron dot notation: Xe 54 Xe Xenon

Write/draw 5 ways to illustrate the element to the left (presume a neutral atom) Element Name: Element Symbol: Electron Configuration: Bohr Model: Electron Dot Notation: 56 Ba Barium

[Xe]6s 2 Number of valence electrons (in the last s & p orbitals) Electron dot notation: Ba 56 Ba Barium

Homework Complete page 47, answers are on website Prepare for test on Friday Add 5 new vocab words to Vocabulary Section