Chemistry review Atomic Structure

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Chemistry review Atomic Structure

  1. 1. CHEMISTRY
  2. 2. BIG IDEAS <ul><li>The number of protons in the nucleus of an atom determines what the element is. </li></ul><ul><li>The way that electrons are organized around the nucleus of an atom determines how it interacts with other substances. </li></ul><ul><li>Atoms join together chemically to create strong bonds resulting in new substances called compounds. </li></ul>
  3. 3. Atomic Structure
  4. 4. Main Ideas: <ul><li>An atom is the smallest part of an element that can exist and still be identifiable as that element; building blocks of elements. </li></ul><ul><li>An e lement a type of matter made of many identical atoms. </li></ul>
  5. 5. An atom is the smallest part of an element that can exist.
  6. 6. An e lement is a substance made up of a single type of tiny particles called atoms.
  7. 7. Meet the Elements Song - TMBG Elements Song - Tom Lehrer
  8. 8. What are atoms? -Atoms are the basic building blocks of matter that make up everyday objects. -A desk, the air, even you are made up of atoms! -There are 90 naturally occurring kinds of atoms.
  9. 17. How do atoms get their identity? <ul><li># of PROTONS </li></ul><ul><li>= atomic number </li></ul>
  10. 18. ATOMIC NUMBER and MASS NUMBER Atomic number 12 6 C Mass number Number of protons (+) Protons + Neutrons
  11. 19. Elemental Notation <ul><li>Atomic Number – the number of protons in the nucleus of the atom. </li></ul><ul><li>Atomic Mass – the total number of protons and neutrons in a nucleus. </li></ul>
  12. 20. <ul><li>Molecules are a single unit of 2+ atoms bonded together. </li></ul><ul><ul><li>usually same type of atom </li></ul></ul><ul><li>Compounds are many molecules; made of 2+ different elements (different types of atoms) that are chemically bonded together so elements have new properties (ex: NaCl) </li></ul><ul><li>examples of differences between molecules and compounds </li></ul>
  13. 21. Magnesium Atoms Oxygen Atoms Molecules of magnesium oxide Summary element element compound atom atom molecule
  14. 22. Compounds are pure substances made of 2 or more elements chemically BONDED together.
  15. 23. Which are molecules and which are compounds?
  16. 24. Li + + H 2 O  LiOH + H 2 If lithium is added to water , lithium reacts with the water molecule forming lithium hydroxide and hydrogen gas . Alkali
  17. 25. Count the atoms for each element that makes up the following compounds: Example: Water – H 2 O 2 atoms of Hydrogen 1 atom of oxygen COUNTING ATOMS
  18. 27. A MIXTURE is a material made up of 2+ substances which may be elements or compounds that are NOT CHEMICALLY BONDED.
  19. 28. Properties of Mixtures <ul><li>The composition of a mixture is variable. </li></ul><ul><li>Each of its components retains its characteristic properties. </li></ul><ul><li>Its components are easily separated. </li></ul>
  20. 29. Which are mixtures and which are compounds? <ul><li>soil </li></ul><ul><li>ocean water (H 2 0 + NaCl) </li></ul><ul><li>air (O 2 + N 2 + CO 2 + Ar) </li></ul><ul><li>water (H 2 O) </li></ul><ul><li>table salt (NaCl) </li></ul><ul><li>Sugar (C 12 H 22 O 12 ) </li></ul>
  21. 30. http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/M/Mixtures.html
  22. 31. http://www.google.com.ph/imglanding?q=mixtures+and+compounds&hl=tl&sa=X&biw=1020&bih=567&tbs=isch:1&prmd=ivns&tbnid=hbOgJj5q_O3mEM:&imgrefurl=http://www.teem.org.uk/1060/buy.html&imgurl=http://www.teem.org.uk/img/47/SF1060_3310.jpeg&ei=jj1jTZ3oGcSXcfmHxLsJ&zoom=1&w=500&h=349&iact=rc&oei=QT1jTZTfC4ukugOH0d28AQ&page=1&tbnh=128&tbnw=183&start=0&ndsp=14&ved=1t:429,r:11,s:0
  23. 32. http://www.google.com.ph/imglanding?q=mixtures+and+compounds&hl=tl&sa=X&biw=1020&bih=567&tbs=isch:1&prmd=ivns&tbnid=eet6vXOJz3e-qM:&imgrefurl=http://www.quantumtheatre.co.uk/BDks2web.html&imgurl=http://www.quantumtheatre.co.uk/BDks2web_files/image006.jpg&ei=QT1jTZTfC4ukugOH0d28AQ&zoom=1&w=604&h=292&iact=rc&oei=QT1jTZTfC4ukugOH0d28AQ&page=1&tbnh=90&tbnw=187&start=0&ndsp=14&ved=1t:429,r:4,s:0
  24. 33. Atom Molecule Mixture Compound Element

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