Take Out

• Science notebook open to homework• Catalyst sheet• Pencil

Catalyst

16

SSulfur32.065

Atomic Number:Protons:Neutrons:Electrons:Element Symbol:Element Name:State of Matter:Atomic Mass:Element type:

Energy LevelsThe 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.

2p4

Energy levelOrbital

number of electrons in that orbital

Yellow Brick Road

7s 7p 7d 7f

1s

2s 2p

3s 3p 3d

6s 6p 6d 6f

5s 5p 5d 5f

4s 4p 4d 4f

START

Energy Level (n) Electron Capacity (2n2)

1 22 83 184 325 506 72

The maximum number of electrons that can occupy a specific energy level can be found using the following formula:

Electron Capacity = 2n2

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

AlAluminum

26.982

Atomic Number:Protons:Neutrons:Electrons:Element Symbol:Element Name:State of Matter:Atomic Mass:Element type:Electron Configuration:

Green = NonmetalsYellow = MetalsBlue = Transition MetalsOrange = Noble Gases

1s22s22p63s23p1

How many electrons does Al have in each energy level?

1st energy level:

2nd energy level:

3rd energy level:

Write the electron configuration for Carbon

Draw a Bohr model of Carbon

6

CCarbon

12.011

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

SbAntimony

127.60

Catalyst

Valence ElectronsValence electrons are electrons that are in the outer most level of

the electron cloudThey are always found in s & p

orbitalsHow many valence electrons does

Aluminum have?

1s22s22p63s23p1

Electron Dot Notation

Al

Valence electrons

1s22s22p63s23p64s23d1

04p64d105s25p3

Number of valence electrons

(in the last s and p orbitals)

Electron dot notation:

Sb

51

SbAntimony

127.60

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

C12.011

Catalyst

1s22s22p2

Number of valence electrons

(in the last s and p orbitals)

Electron dot notation:

C

6

CCarbon

12.011

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

P30.973

1s22s22p63s23p3

Number of valence electrons

(in the last s & p orbitals)

Electron dot notation:

P

15

PPhosphorous

30.973

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

K39.0983

1s22s22p63s23p64s1

Number of valence electrons

(in the last s orbital)

Electron dot notation:

K

19

KPotassium

39.0983

20.098

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

Xe131.293

1s22s22p63s23p64s23d10

4p65s24d105p6

Number of valence electrons(in the last s & p orbitals)

Electron dot notation:

Xe

54

XeXenon131.293

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

BaBarium137.327

[Xe]6s2

Number of valence electrons(in the last s & p orbitals)

Electron dot notation:

Ba

56

BaBarium137.327

Homework

Complete page 47, answers are on website

Prepare for test on Friday

Add 5 new vocab words to Vocabulary Section