1. Elements and Compounds
Created by Kesler Science – More 5E lessons at KeslerScience.com
Presented by Kesler Science

2. Essential Questions:
What is the difference between elements, compounds, and mixtures?

3. Elements and Compounds
Dmitri Mendeleev
Russian chemist and inventor
Formulated the Periodic Law
Arranged the periodic table by atomic weight and similar properties
Predicted the properties of eight elements yet to be discovered

4. Quick Action – INB Template
Cut the INB template out and glue along the narrow tabs into notebook.
Fold each side back and add notes under each section.
You will refer back to this page several times as you view this presentation.
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5. Elements and Compounds
Matter
Pure Substance
Element
Compound
Mixture
How is matter classified? 

6. Elements and Compounds
Matter
Everything around you
Anything that has mass and takes up space
Atoms and molecules are all composed of matter.
Can be solid, liquid, or gas

7. Elements and Compounds
Solid Phase of Matter
Has a definite volume and definite shape
Molecules are tightly packed.
Does not flow easily – particles cannot move/slide past one another
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8. Elements and Compounds
Liquid Phase of Matter
Has a definite volume but no definite shape
Flows easily - particles can move past one another
Lots of free space between particles
Takes the shape of their containers
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9. Elements and Compounds
Gas Phase of Matter
Has no definite shape or definite volume
Lots of free space between particles
Flows easily - particles can move past one another
Takes the shape and volume of its container.
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10. Elements and CompoundsH H2
Compound
H2O
Pure Substance
Has a definite and constant composition
Can be either an element or a compound
The composition of a pure substance doesn’t vary.
Ex: salt or sugar
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11. Elements and Compounds
Molecule
2 or more atoms bonded together
Represents the smallest particle in a chemical compound that can take place in a chemical reaction.
Has the same chemical properties of that element or compound.
Some molecules consist of two atoms of the same element.
Ex. O2
Other molecules consists of two or more atoms.
Ex. (H2O)   
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12. A pure substance that cannot be broken down into any other substance.
Elements and Compounds
Element
A pure substance that cannot be broken down into any other substance.
It is represented on the periodic table by a symbol.
Ex: Au is Gold Au Au Au
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13. Quick Action – INB Template
Cut the INB template out and glue along narrow tabs into notebook.
Research using the web to find the most abundant elements percentage in Earth’s crust, Earth’s atmosphere, Earth’s oceans, and Earth’s living matter.
Create pie charts to represent each.
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14. Quick Action – INB Template
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15. Elements and Compounds
A pure substance formed when one or more elements have chemically combined through a chemical reaction to form a new substance
It is represented by a formula.
Ex: NaCl - Sodium Chloride (salt) Cl Na H H O
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16. Elements and Compounds
Counting elements in a molecule
Count the number of different capital letters or element symbols in the compound.
Na2O
1 - Na
1 - O
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17. Quick Action – Elements and Compounds
Get with your table and discuss how to count the number of different elements in a compound.
Complete the chart by counting the elements and naming them.
Formula
# of different elements
Name of elements
H2O
NaCl
C6H12O6
NaOH
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18. Quick Action – INB Template
Cut out the INB template and glue along the narrow tab.
Looking at the formula, decide if it is a compound or an element.
Name each element in the formula.
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19. A combination of many different elements
Elements and Compounds
Mixture
A combination of many different elements
Not chemically combined
Can be separated
Ex: Trail mix
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20. Check for Understanding
Can you…
Differentiate between elements, compounds, and mixtures?
Clear up any confusion and answer questions.
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