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I am Dmitri Mendeleev!

I am Dmitri Mendeleev!. I made the PERIODIC TABLE !. What is the PERIODIC TABLE?. Shows all known elements in the universe. Organizes the elements by chemical properties. How do you read the PERIODIC TABLE?. What is the ATOMIC NUMBER?. The number of protons found in the nucleus of an atom

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I am Dmitri Mendeleev!

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  1. I am Dmitri Mendeleev! I made the PERIODIC TABLE !

  2. What is the PERIODIC TABLE? • Shows all known elements in the universe. • Organizes the elements by chemical properties.

  3. How do you read the PERIODIC TABLE?

  4. What is the ATOMIC NUMBER? • The number of protons found in the nucleus of an atom Or • The number of electrons surrounding the nucleus of an atom.

  5. What is the SYMBOL? • An abbreviation of the element name.

  6. What is the ATOMIC WEIGHT? • The number of protons and neutrons in the nucleus of an atom.

  7. How do I find the number of protons, electrons, and neutrons in an element using the periodic table? • # of PROTONS= ATOMIC NUMBER • # of ELECTRONS= ATOMIC NUMBER • # of NEUTRONS= ATOMIC _ ATOMIC WEIGHT NUMBER

  8. Families on the Periodic Table • Elements on the periodic table can be grouped into families bases on their chemical properties. • Each family has a specific name to differentiate it from the other families in the periodic table. • Elements in each family react differently with other elements.

  9. Periods • Each row is called a “period” • The elements in each period have the same number of shells 1st Period = 1 Shell 2nd Period = 2 Shells 3rd Period = 3 Shells 4th Period = 4 Shells www.chem4kids.com

  10. Groups Group 8 = 8 electrons Group 1 = 1 electron Except for He, it has 2 electrons Group 2 = 2 electrons • Each column is called a “group” 3,4,5,6,7 • Each element in a group has the same number of electrons in their outer orbital, also known as “shells”. • The electrons in the outer shell are called “valence electrons” www.chem4kids.com

  11. Determine the number of shells and the number of valence electrons for: Sodium - Na 3rd Period = 3 shells 1st Group = 1 valence electron www.chem4kids.com

  12. Write your answers on your handout. Ne Name the element. Number of shells ? Valence electrons ?

  13. Write your answers on your handout. Ne Name the element. Number of shells ? Valence electrons ? Neon 2nd Period = 2 shells 8th Group = 8 valence electrons

  14. Write your answers on your handout. H Name the element. Number of shells ? Valence electrons ?

  15. Write your answers on your handout. H Name the element. Number of shells ? Valence electrons ? Hydrogen 1st Period = 1 shell 1st Group = 1 valence electron

  16. Write your answers on your handout. Be Name the element. Number of shells ? Valence electrons ?

  17. Write your answers on your handout. Be Name the element. Number of shells ? Valence electrons ? Beryllium 2nd Period = 2 shells 2nd Group = 2 valence electrons

  18. Write your answers on your handout. S Name the element. Number of shells ? Valence electrons ?

  19. Write your answers on your handout. S Name the element. Number of shells ? Valence electrons ? Sulfur 3rd Period = 3 shells 6th Group = 6 valence electrons

  20. Write your answers on your handout. K Name the element. Number of shells ? Valence electrons ?

  21. Write your answers on your handout. K Name the element. Number of shells ? Valence electrons ? Potassium 4th Period = 4 shells 1st Group = 1 valence electron

  22. Write your answers on your handout. He Name the element. Number of shells ? Valence electrons ?

  23. Write your answers on your handout. He Name the element. Number of shells ? Valence electrons ? Helium 1st Period = 1 shell 8th Group = 2 valence electrons • Helium is the exception in Group 8. • Since it has just one shell, that shell can only fit 2 electrons instead of 8. • It is in this group because all the elements have a full outer shell.

  24. Now you are almost as smart as I am! But not as handsome! Man, I look GOOD!

  25. Elements, Compounds, and Mixtures

  26. What is an ELEMENT? • A substance composed of a single kind of atom. • Cannot be broken down into another substance by chemical or physical means.

  27. What is a COMPOUND? • A substance in which two or more different elements are CHEMICALLY bonded together.

  28. What is a MIXTURE? • Two or more substances that are mixed together but are NOT chemically bonded.

  29. Element, Compound or Mixture?

  30. Element, Compound or Mixture?

  31. Element, Compound or Mixture?

  32. Element, Compound or Mixture?

  33. Element, Compound or Mixture?

  34. Element, Compound or Mixture?

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