First Test

• What is a Covalent Bond?

  When two or more Non-Metal atoms share electrons to create a full outer shell
• What is an Ionic Bond?


  When a Metal and Non-Metal give away electrons to create a full outer shell
• What is a Metallic Bond?


  When two or more Metals are bonded to create a full outer shell
• What is the Charge, Mass and Location of a Proton?


  Charge +1, Mass 1, Location Nucleus
• What is the Charge, Mass and Location of a Neutron?


  Charge 0, Mass 1, Location Nucleus
• What is the Charge, Mass and Location of an Electron?


  Charge -1, Mass 1/2000, Location Energy Levels (Shells)
• What is an Isotope?


  An isotope is an atom with the same number of protons and same atomic number, but a different number of neutrons
• What is Relative Atomic Mass?


  The average of all isotopes of an atom compared to 1/12 of the mass of the carbon-12 atom.

  ∑ isotope mass x isotope abundance / 100
• What is the Atomic Number?


  The number of protons in an atom
• What is Relative Isotopic Mass?


  The mass of a specific isotope compared to 1/12 of the mass of the carbon-12 atom
• What is the Calculation to Find Moles?


  Moles = Mass in Grams/Relative Atomic Mass
• What is Empirical Formula?


  Find the Number of Moles in each Element

  Divide All by the Smallest Number of Moles

  Use the Lowest Whole Numbers in the Ratio
• PRACTICAL: Empirical Formula of Magnesium Oxide


  Mass of Crucible - 36.77g

  Mass of Crucible + Mg - 36.90g

  Mass of Crucible + MgO - 36.96g

  Mg:O

  0.13g/24:0.06g/16

  3:2
• How to Find Moles?

  • E equation
  • M moles of something
  • M moles of everything
  • A answer