Pure Substances
Elements and Compounds

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Pure Substances: Elements and Compounds

Elements are pure substances that cannot be separated into simpler substances by physical or chemical means. They are all listed on a special chart called . . .

The Periodic Table of the Elements.

This is a chart that chemistry students have had to memorize (in college!) for years and there is SO much information on here that a special way was needed. So Tom Lehrer wrote this famous song. As he sings the names of all the elements - - really fast (!) - - watch as the Periodic table is built in this really good animation video clip. See how many you already recognize.

Attribution:

video clip from You tube

Question Mark Image

Explore

Print the Coloring Periodic Table sheet. As you click on each of the groups in the link below, color the row/column of the table that represents that group. Make sure you color in the key at the top of your sheet so you can know which section is which!

 

TableSnip.png  

Attribution:

image from linked website

Explain

 matter diagram.JPG

 

There are three categories of elements. These are: metals, nonmetals, and metalloids.

 

Metals are shiny (have luster), malleable (can be flattened), ductile (can be drawn into wire), and they are good conductors of heat and electricity.

lead.jpg copper.jpg tin.jpg

Lead,copper, and tin are examples of metals.

 

 

 

Nonmetals do not conduct heat or electric current, and solid nonmetals are dull in appearance.

Sulfur.jpg iodine.jpg neon.jpg

Sulfur, iodine, and neon are examples of nonmetals.

 

 

Metalloids have properties of both metals and nonmetals.

 

boron.jpg silicon.jpg antimony.jpg

Boron, silicon, and antimony are examples of metalloids.

 

The following video will further explain the relationship between the different forms of matter.

Many compounds are everyday substances that you may use. The chart below will show you some familiar compounds. 

Familiar Compounds

Elements that are chemically combined

Table Salt

Sodium and Chlorine

Water

Hydrogen and Oxygen

Sugar

Carbon, Hydrogen, and Oxygen

Carbon Dioxide

Carbon and Oxygen

Baking Soda

Sodium, hydrogen, carbon, and oxygen

 

Each compound has a unique set of properties that allows you to distinguish it from other compounds. These compounds, like elements, can be identified by its own physical and chemical properties.

 

A compound has different properties from the elements that form it. For example, table salt consists of sodium, which reacts violently with water, and chlorine, which is a poisonous gas. However, when they are chemically combined they create a compound that is safe to eat and does not react with water.

table salt.jpg

 

Breaking Down Compounds into Simpler Substances:

Compounds cannot be broken down by physical means. Compounds can only be broken down by chemical means. This means that compounds must go through a chemical change to form a simpiler substance.

Compounds are all around you! Compounds make up the foods you eat, the things you use, and even you!

 

Go on to the next section, and continue to explore the Periodic Table of Elements.  

Extend

Practice remembering the symbols for these chemical elements by playing the following matching game.

elements game.JPG

Attribution: Sheppards Software

Evaluate

Explore your Periodic Table and find the chemical symbols for the following elements. You will want to start memorizing these, and be able to recognize them. Place this in the Chemical Symbols dropbox.

 This chart in an .rtf document... use this worksheet so you can type into the chart!

Chemical Symbol

Element Name

Chemical Symbol

Element Name

H

Hydrogen

He

Helium

Li

 

Be

 

B

 

C

 

N

 

O

 

F

 

Ne

 

Na

 

Mg

 

Al

 

Si

 

P

 

S

 

Cl

 

Ar

 

K

 

Ca

 

Mn

 

Fe

 

Au

 

Hg

 

Pb

 

I

 

Xe

 

Rn

 

As

 

Br

 

Kr

 

Ag

 

Co

 

Ni

 

Cu

 

Zn

 

 

 

Can you answer today's driving question?

What is an element?

Your Tasks:

items to be submitted

1. Read, listen to, and work to master the material presented in this lesson.

 

2. Print the Periodic Table of the Elements Coloring sheet and color it as explained on the Explore Page.

 

3. Download the Chemical Symbols Table worksheet and type in the names of each of the symbols. Turn it in to the Chemical Symbols Dropbox.

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