Element, Compound, Mixture, Bonding Review Find more quiz review material at: www.mrkowalik.com/chemistry.

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Presentation transcript:

Element, Compound, Mixture, Bonding Review Find more quiz review material at:

Vocabulary Element: a pure chemical substance consisting of one type of atom (carbon) Compound: 2 or more elements chemically bonded together. Mixture: 2 or more elements combined, not bonded Molecule: 2 or more atoms joined together (like a compound) but can include single types of elements H 2 (Molecular Hydrogen) N 2 (Molecular Nitrogen) H 2 O (Molecule of Water) - Molecule is the smallest bit of a substance

Examples Mixture, Element or Compound? C 12 H 22 O 11  Compound Lemonade  Mixture Oxygen  Element Car Exhaust  Mixture Ammonia  Compound

Maintaining Ratios Fact: Water is H 2 O Fact: Lots of water is lots of “H 2 O”s Fact: H 10 O 5 has the same ratio Fact: H 10 O 5 is not water Fact 5H 2 O is lots of water

Yummy Poisonous Explosive French Fries Elements do not maintain their original chemical characteristics when combined to create a compound. Sodium Chloride

Change Physical Break or Cut Does not change the substance Does not break bonds Chemical Creates a new substance Breaks Chemical Bonds Heat, Acids

Nitrogen -5 valence electrons Hydrogen -1 valence electrons The single Hydrogen electrons bond to the 3 single Nitrogen electrons. Don’t forget to record the Protons and Neutrons in the nucleus…