PURE SUBSTANCES & MIXTURES



Pure Substances & Mixtures Anticipation Guide
Substances Glossary
Substances Vocab. Jumble
Chemical Reactions Video BNSG
Substances Wordsearch
Substances Crossword
Solvents, Solutes, Solutions Info.
Periodic Table Quiz
Periodic Table - Atomic Numbers
Pure Substances & Mixtures Quiz
Rocks vs. Minerals
Water Cycle
pH Scale
Common Acids



Elemental Battleship!
Fun Periodic Table Assignment
Elements Guess Game
Amazing Compounds
Acid Lake Demo
Bonus Assignment

What is a Pure Substance?

A pure substance is made up of only one material and has set properties. Water & table salt are two examples of pure substances. Each is made up of only one kind of material with set properties. The simplest kind of pure substance is an element. It can't be broken down into any other simpler substances. An example of an element is aluminum. Another pure substance is a compound. Compounds are pure substances that are made of more than one element. It is also two or more elements put together or chemically combined. Sugar is a compound made up of the elements carbon, hydrogen & oxygen.

Water is a compound. ~0.7% of the water on earth is accessible freshwater. Canadians use 260+ litres of water/day per person. Most of earth's water is salt water (oceans) ~98%. Most freshwater is frozen in glaciers. ~65%. About 1.5% of all water on the earth (fresh & salt) is locked up in snow & ice.

Fluorine is added to drinking water by some municipalities to try to prevent tooth decay (cavities).
EXAMPLES:

Compounds

Elements

Water

Hydrogen

Sugar

Carbon

Table Salt

Sodium


Earth's Crust Elements:

ELEMENT % OF THE CRUST (BY WEIGHT)
Oxygen (O)46.6
Silicon (Si)27.7
Aluminum (Al)8.1
Iron (Fe)5.0
Calcium (Ca)3.6
Sodium (Na)2.8
Potassium (K)2.6
Magnesium (Mg)2.1
All others1.7

Chemical Symbols & their Origins


ELEMENT SYMBOL ORIGIN OF NAME
Mendelevium Md Mendeleev (Russian Chemist who designed the periodic table)
Lead Pb plumbum is "lead" in Latin
Thorium Th Thor is the Norse god of thunder
Polonium Po for Poland, where Marie Curie (scientist) was born
Hydrogen H From Greek meaning "water former"
Gold Au Aurum means "shining dawn" in Latin
Francium Fr in honour of France
Iron Fe fer is iron in French
Helium He from the Greek "helios" meaning sun
Titanium Ti Titans (sons of the Sky & Earth gods: Greek mythology)


Interactive pH Scale Site!!!

Make Symbol Code

Chem4kids.com

Chemicalelements.com

Creative-chemistry

Interactive Periodic Table

The Periodic Table - What / Why

Webelements

Elements Uses