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Why Does The Number Of Elements Vary From Period To Period?

Published on Nov 21, 2015

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PRESENTATION OUTLINE

Untitled Slide

  • Why does the number of elements vary from period to period?
  • Why is aluminum recycled?
  • Why do elements in a group have similar properties?
  • Why is hydrogen located on the left side of the periodic table with the active materials?
  • What two factors determine the atomic mass of an element?

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  • Describe the periodic table
  • How is the modern periodic table organized?
  • How do properties vary across a period in the periodic table?
  • Why is hydrogen located in a group with the least reactive?
  • What is the main use of sulfer

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  • Why was it difficult to discover the noble gases?
  • How many valence electrons do atoms of oxygen and sulfur have
  • How are the elements order in
  • What categories are used to classify elements on the periodic table
  • Why are there still empty spaces in the periodic table

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  • What happens to the reactivity of the elements or you move across the table from left to right
  • List are active ualogin
  • What is the most reactive type of metal
  • Explain the difference between metals and metalliod
  • Name 3 ways to classify they elements in the periodic table

Untitled Slide

  • Why is the chlorine added to drinking water?
  • What is copper an example of?
  • What is the most reactive group of metals?
  • What is an atomic mass?
  • What is a nonmetal?