Metals and non-metals in the periodic table

• Who made an early periodic table?

  Mendeleev
• How are elements arranged in the modern periodic table?

  Elements are arranged in order of atomic number in periods and groups
• What do electronic structures model?

  They model how electrons are arranged in atoms
• Where are metal elements located in the periodic table?

  • On the left of a stepped line starting at B-Al-Si
• Where are non-metal elements located in the periodic table?

  • On the right of the stepped line
• Which groups in the periodic table contain metals?

  Groups 1 and 2
• How many electrons do atoms of group 1 elements have in their outer shell?

  One electron
• How many electrons do atoms of group 2 elements have in their outer shell?

  Two electrons
• Which groups in the periodic table contain non-metals?

  Groups 6, 7, and 0
• How many electrons do atoms of group 7 elements have in their outer shell?

  Seven electrons
• How many electrons do atoms of group 0 elements have in their outer shell, except helium?

  Eight electrons
• What is the relationship between the reactions of elements and the number of electrons in their outer shells?

  The reactions are related to the number of electrons in their outer shells
• What do atoms of metal elements do in their reactions?

  They give away electrons to form positive ions
• Why are the ions formed from metal elements very stable?

  Because they have a full outer electron shell
• What do atoms of non-metal elements do in some of their reactions?

  They gain electrons to form negative ions
• Why are the ions formed from non-metal elements very stable?

  Because they have a full outer electron shell
• What is the significance of having a full outer electron shell for ions?

  • Ions with a full outer shell are very stable
  • This stability affects their reactivity