elements, compounds, and mixtures
DESCRIPTION
Elements, Compounds, and Mixtures. No warm up, we are jumping right in to this… but first…. Homework…. Create a cube… On the sheet you will draw a picture of… 1 Element 2 Compounds 1 Heterogeneous Mixture 1 Homogeneous Mixture - PowerPoint PPT PresentationTRANSCRIPT
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ELEMENTS, COMPOUNDS,AND MIXTURESNo warm up, we are jumping right in to this…
but first…
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QUIZ!!!Clear Your Desk
Get out a writing utencil
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ELEMENTSSo… what is an element?
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ELEMENTS• An element is…
• A pure substance• Single kind of matter that has a
specific makeup and properties• Cannot be broken down into any other
substances by physical or chemical means• It is the SIMPLEST of substances!!!
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WHEN ELEMENTS COMBINE
• Atom – Basic particle from which all elements are made.• Chemical bond – force of attraction
between two atoms• Molecules – groups of two or more atoms
held together by chemical bonds.
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WHEN ELEMENTS COMBINE
•Two atoms of the same type can form a molecule!
•Oxygen we breathe is •Nitrogen in the ground (and air) is
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COMPOUNDSWhat is a compound?
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COMPOUND• Compound is a pure substance made of
two or more elements chemically combined in a set ratio.• Water = • (2 Hydrogen to 1 Oxygen or 2:1)
• Carbon Dioxide = • (1 Carbon to 2 Oxygen)
• Sugar = (12 Carbon, 22 Hydrogen, 11
Oxygen) …or 12:22:11
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COMPOUNDS
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“DIATOMIC” MOLECULES
• There are seven elements that form diatomic molecules.
•Hydrogen (H2)•Nitrogen (N2)•Oxygen (O2)• Fluorine (F2)• Chlorine (Cl2)• Iodine (I2)• Bromine (Br2)
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MIXTURE
What in the world is a mixture?(and)
What makes it different from a Compound?
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MIXTURE•Mixture – Made of two or more substances (elements or compounds or both) that are together in the same place but…
NOT CHEMICALLY COMBINED
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MIXTURE
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MIXTURES• 2 types of Mixtures•Heterogeneous & Homogeneous
•Heterogeneous = You can see the individual parts•Homogeneous = So evenly mixed you cannot see the individual parts!
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MIXTURES
• I want EXAMPLES of Heterogeneous Mixtures!!!
•Now I want EXAMPLES of Homogeneous Mixtures!!!
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SEPARATION ANXIETY•How can we separate a mixture?•Manually remove•Magnetic attraction• Filtration•Distillation• Evaporation
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REVIEW…The simplest structure that cannot be broken down into any other substances by chemical or physical means is…
1) Mixture2) Compound3) Element4) Substance
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REVIEW…A pure substance made of two or more elements chemically combined in a set ratio is called…
1) Mixture2) Compound3) Element4) Substance
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REVIEW…This is made of two or more substances that are together in the same place but not chemically combined…
1) Mixture2) Compound3) Element4) Substance
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REVIEW…• A mixture where you can see the
individual parts is called…
1) Solution2) Homogeneous Mixture3) Compound4) Heterogeneous Mixture
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REVIEW…• A mixture where you cannot see the
individual parts is called…
1) Element2) Homogeneous Mixture3) Compound4) Heterogeneous Mixture