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The Periodic Table

The Periodic Table. Dimitri Mendeleev was the Russian scientist who developed the modern Periodic Table The Periodic Table is an arrangement of all elements in order of atomic number. Groups (family). A column in the periodic table Elements have similar properties. Periods.

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The Periodic Table

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  1. The Periodic Table • Dimitri Mendeleev was the Russian scientist who developed the modern Periodic Table • The Periodic Table is an arrangement of all elements in order of atomic number.

  2. Groups (family) • A column in the periodic table • Elements have similar properties

  3. Periods • A row on the periodic table • Elements in the same period have the same number of electron rings

  4. Element • A pure substance made of only 1 kind of atom. • Cannot be broken down into any other substance. • Refer to p 604-605 in textbook

  5. Hydrogen • Composed of a single proton and a single electron, hydrogen is the simplest and most abundant element in the universe • It is estimated that 90% of the visible universe is composed of hydrogen. • Hydrogen is the raw fuel that moststars 'burn' to produce energy.

  6. Properties of Elements • An element’s physical and chemical properties can be predicted by its location on the periodic table.

  7. Physical Properties • Are observed by using the senses and can be determined without destroying the object Color Odor Shape Density Length Mass

  8. Chemical Properties • Indicates how a substance will react with something else • Can be observed only during a chemical change

  9. How Elements Are Represented • Elements are represented by symbols • Symbols start with 1 capital letter and can be followed by 1 or 2 lower caseletters N Uuq Ca

  10. Elements in Air 78% Nitrogen 21% Oxygen 1% other gases

  11. Elements in Living Matter • Hydrogen- most abundant because of water in living things • Oxygen • Carbon

  12. Elements in Land • Oxygen 46% • Silicon 27% • Aluminum 8% • Iron 5% • Other Ca, Na, K, Mg

  13. Elements in the Ocean • Hydrogen (twice as much as oxygen) • Oxygen • Sodium • Chlorine H2O NaCl

  14. Compounds (ref.p.28) • A new substance made when 2 or more different elements chemically combine • The properties of the new substance are different from the original properties • Elements occur in a set ratio represented by a formula

  15. NH3 FORMULA C6H12O6 • Tells the recipe for the molecules in the compound by using symbols and subscripts • The symbol tells the element • The subscript number tells how many of each atom in the molecule. • Molecules come together to make the compound

  16. Find the Compound Below H He Ca FeO

  17. Find the Compounds • Water Iron • Silicon Nitrogen • Oxygen Salt • Carbon Dioxide Sugar

  18. Find the picture of an element.Find the picture of a compound. B A C

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