chemical symbols 10/15/2012 s: define in your own words what an element is and what an element is...

Chemical Symbols10/15/2012

S: Define in your own words what an element is and what an element is not.

P: Video on the Periodic Table

Properly write a chemical symbol

All elements in the Periodic Table have symbols that are recognized world wide.

It does not matter which country you are in or the language you speak.

Example: The element Iron is always identified by “Fe” and Oxygen is “O”.

The names are not always the same but the symbols are. “Fe” is iron in Canada, fer in France and fier in Romania.

A:

Chemical Symbols

A Chemical symbol is an abbreviation of a name of an element.

ElementElement Chemical Chemical SymbolSymbol

OxygenOxygen

NitrogenNitrogen

HydrogenHydrogen

SodiumSodium

OO

NN

HH

NaNa

Elements3 Naming Rules

Rule 1: PRINT all symbols. Rule 2: If there is only one

letter, that letter is always a capital. Example: H for hydrogen

Rule 3: If there are two letters, the first letter is a capital and the second is lower case. Example: He for helium

Worksheet

Use the periodic table in your textbook to complete the worksheet.

Why do you think scientists use symbols instead of element names?

C:

Create a symbol for your own element. Write the name of the element and tell one special characteristic of it.

E:

JmJudsonium

It bonds students together in hallways.

Identify the Correct or Incorrect chemical symbols

CA

CACaCa

CA

cA

M&M Lab: Elements and Compounds10/16/2012

S:

Elements Correct

CA

CACa

Ca

CAcA

To understand that elements can be represented by chemical symbols; to understand that compounds can be represented by chemical formulas; and to understand that the ratio of elements in a compound are demonstrated in its chemical formula.

Purpose of Today’s Lab:

P: Copy in Journal

Hypothesis:

I think there will be ___ red M&Ms, ___ Orange M&Ms, ___ Yellow M&Ms, ___ Green M&Ms, ___ Blue M&Ms, and ___ Brown M&Ms in my bag of elements.

A:Draw the chart below in journal M & Ms

ColorSymbo

l

Total # of

Atoms in the Bag

# of Atoms

# of Atoms

# of Atoms

# of Atoms

# of Atoms

# of Atoms

# of Atoms

# of Atoms

# of Atoms

Red R 2

Orange

Or

Yellow Y 1

Blue Bl 3

Green G 1

Brown Bn 4

Chemical Formula

R2Bl3G YBn4

• You have been given a mystery bag of mixed “elements”. Each M&M represents an atom of an element, and each color represents a different type of element, with its own symbol, given in the chart below. Before opening your bag of elements, hypothesize about how many of each type of element you have been given. • Taking turns, you and your partner will build 7 different compounds for each other. Record the number of atoms of each element used in the compound in the chart, and then write the formula for the compound in the space provided. You may reuse the elements as needed to make the different compounds.

Directions:

C: Draw two of the compounds you created. Use color. Create a color key to identify the elements in your drawing. Name your compounds.

E: Conclusion: Using complete sentences and in your own words, write 3 rules that must be followed when writing chemical formulas and symbols.

10/17/2012

S:Write the chemical symbol for the following elements:

Sulfur Oxygen

Helium Hydrogen

Nitrogen Sodium

P: Edusmart

Compounds

A: Element or Compound

C: List as many compounds as you can….

E: Describe the difference between an element and a compound.

10/18/2012S: Identify the color of the liquid based upon density.

Densities of liquids:Light corn syrup

= 1.33 g/mLWater

= 1.00 g/mLDish soap

= 1.04 g/mLIsopropol alcohol

= 0.85 g/mL

P: A Pure Substances is…A sample of matter that has definite

chemical and physical properties.

Elements: pure substance that cannot be separated into simpler substance by physical or chemical means.

Compounds

Pure substance composed of two or more different elements joined by chemical bonds.

Made of elements in a specific

ratio that is always the sameHas a chemical formulaCan only be separated by chemical means, not physically

Mixtures

A combination of two or more pure substances that are not chemically combined.

substances held together by physical forces, not chemical

No chemical change takes place

Each item retains its properties

in the mixture

They can be separated physically Chem4kids.com

Mixtures vs. Compounds

http://www.bbc.co.uk/schools/ks3bitesize/science/chemistry/elements_com_mix_6.shtml

A: Can you identify the following?

An element contains just one type of atom.

A compound contains two or more different atoms joined together.

A mixture contains two or more different substances that are only physically joined together, not chemically.

A mixture can contain both elements and compounds.

Element, Compound, or Mixture?

Rocks


Copper


Jelly Beans


Table Sugar


Diamond


Tea


Salt


Neon Gas


Salad


Pure Water


Aluminum


Lemonade


Silver


Sand

E: What are some of the limitations of this model of elements and compounds?

AA

A

A A

ABAB

AB

AB AB

10/19/2012

S: Determine

the volume:

Determine the density if the mass is 3.2 g.

P: Reading Charts and Graphs

Venn Diagram

1.Which eat bugs?

2.Which have 4 legs?

3.Which are mammals?

4.Which have scales?

1.Which genre of movie is most popular?

2.What percentage of people prefer either romance or action?

FAVORITE MOVIE GENRE

A: Reading Charts and Graphs

Use the class set of READING GRAPHS to gather and record data in your science journal.

C: What is the price difference between the candy bar purchased at a pro sports event and a grocery store?

E:Describe what information consumers should use when making decisions about the products they buy.

chemical symbols 10/15/2012 s: define in your own words what an element is and what an element is...

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