Today’s Agenda10/13/15

Return: Minor Celebration of Knowledge- Chemistry

Reading Chemical Formulas- Notes & Station Activity

-----------------------------------------Homework:

Practice with chemical formulas

3C4H10

CH3OH5Na2SO4

Include elements, atoms,, molecules, ball and stick

models

All About MatterChemical Formulas

An Atom

CoefficientLarge numbers in FRONT of a formula

Indicates how many molecules of a substance there are

To count the TOTAL number of atoms, you must multiply everything in the formula by the coefficient

2H2O

What is this?

Refers to the Hydrogen Tells us how many of the element

subscript

What does it tell us?

2H2O

What is this?

Refers to the MOLECULETells us how many molecules

coefficient

What does it tell us?

2H2O

Two molecules of water have a total

of4 hydrogens

2 oxygens(2x1=2) (2x2=4)

Let’s Practice

1.Identify the elements in this compound.

2.How many molecules are represented in this chemical formula?

3.How many atoms of each element are present in this chemical formula?

Carbon & Hydrogen

4

What is this called?

5C6H12O6

COEFFICIENT

coefficient is a number that is placed in front of a chemical symbol or formula

chemical formula

5C6H12O6

How many carbons in sugar?Hydrogens?Oxygens?

5x6 =305x12=

605x6=30

Ball & Stick Station Activity

Get your paper for the day You will create ball and stick models of different compounds!Be sure to draw the ball and stick model and identify the parts of the chemical formula BEFORE you move on to the next station.

Today’s Agenda10/14/15

1. Correct Last Night’s Homework

2. Review Yesterday’s Compound Modeling

Lab

-----------------------------------------Homework:

Reflection on reading chemical

formulas.

GLUE it in!

Homework Review

3C4H10

Elements: _____________________ ____ molecules of the

compound____ atoms of Carbon

____ atoms of Hydrogen

3Carbon & Hydrogen

1230

Homework ReviewCH3OH

Elements: _____________________ ____ molecule of the

compound____ atom of Carbon

____ atoms of Hydrogen____ atom of Oxygen

1Carbon, Hydrogen & Oxygen

141

Homework Review5Na2SO4

Elements: _____________________ ____ molecules of the

compound____ atoms of Sodium____ atoms of Sulfur

____ atoms of Oxygen

5Sodium, Sulfur & Oxygen

10520

H2O

2 elementsHydrogenOxygen

2- Hydrogen1- Oxygen

1

5H2O

2 elementsHydrogenOxygen

10- Hydrogen5- Oxygen

5

CO2

12 elements

CarbonOxygen

1- Carbon2- Oxygen

C

OO

C6H12O6

13 elements

CarbonHydrogenOxygen

6- Carbon12- Hydrogen

6- Oxygen

3N2

1 elementNitrogen

6- Nitrogen

3

2NH3

2 elementsNitrogenHydrogen

2- Nitrogen6- Hydrogen

2