Elements compounds and mixtures
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Elements, Compounds and Mixtures. Katina Peck. 3 categories of matter. Elements Compounds Mixtures. H 2 O. Pizza. Cu. Elements. Everything in the Universe is made from about 118 elements. Elements are the building blocks of matter. Cu.

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Elements, Compounds and Mixtures

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Elements compounds and mixtures

Elements, Compounds and Mixtures

Katina Peck


3 categories of matter

3 categories of matter

  • Elements

  • Compounds

  • Mixtures

H2O

Pizza

Cu


Elements

Elements

Everything in the Universe is made from about 118 elements.

  • Elements are the building blocks of matter.

Cu

Each element is made up of the same type of atoms.


Compounds

Compounds

  • Compounds are made up of two or more different elements.

  • Compounds have different properties than the elements that make it up.


Compounds1

H2O

Compounds

  • Each compound is represented by a formula.

    • H2O= 2 Hydrogen & 1 Oxygen, 2:1

    • CO2=1 Carbon & 2 Oxygen, 1:2

    • NaCl= 1 Sodium & 1 Chlorine 1:1

  • Chemically combined in a specific ratio.


  • Compounds2

    compounds

    • Formulas are made of the symbols and a subscript number.

    • The subscript is the number of atoms of that element.

    • A coefficient tells us how many molecules

    • there are.

    Subscript

    Coefficient


    Mixture

    Mixture

    • Most of the matter in the Universe is a compound or a mixture.

    • A mixture is made of two or more substances that are not chemically combined.

    • Substances in a mixture retain their properties.


    Mixture1

    Mixture

    • Two types of mixtures:

    • Heterogeneous

      • Substances in the mixture are easily distinguished.

      • Pizza, trail mix, Italian salad dressing

  • Homogeneous

    • Two or more substances are uniformly mixed.

    • Salt water, the air we breath, soft drinks

  • Heterogeneous

    Homogeneous


    Molecule

    Molecule

    • A molecule is formed when two or more atoms join together chemically.

    • If the molecule is made of two atoms of the same element, it is called a diatomic atom.

      • Di- two

      • Atomic- atom

      • Two atoms

      • H2

      • O2


    Comparison

    Comparison

    • A molecule is formed when two or more atoms join together chemically.

    • A compound contains at least two different elements.

    • All compounds are elements, but not all elements are compounds.


    Solution

    Solution

    • A homogeneous mixture.

    • Solute- the substance being dissolved.

    • Solvent- the substance that dissolves a solute.

    • Solubility- the amount of solute that will dissolve in a solvent.

    Solvent

    Solution

    Solute

    Solute


    Colloids

    Colloids

    • A heterogeneous mixture that never settles.

    • Example: Milk

    • Scatters light


    Suspension

    Suspension

    • A heterogeneous mixture that has particles that settle.

    • Example: Italian salad dressing


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