Periodic Table

• How are elements arranged in the Periodic Table?

  In order of atomic number, in groups and periods
• Why do elements in the same group have similar chemical properties?

  They have the same number of electrons in their outer shell
• What is the electronic configuration of sodium?

  2.8.1
• How can you deduce the electronic configuration of the first 20 elements?

  From their positions in the Periodic Table
• If an element is conductive and its oxide is basic, what is it classified as?

  Metal
• Where are metals generally found in the Periodic Table?

  To the left and towards the bottom
• How is the group number related to the electronic configuration?

  It gives the number of electrons in the outer shell
• Why do noble gases not readily react?

  They have a stable arrangement of electrons
• How many electrons does the first shell hold?

  2
• What determines the chemical properties of an element?

  Number of electrons in the outer shell
• What is the exception to the rule that noble gases have 8 electrons in their outer shell?

  Helium has 2
• How is the period number related to the electronic configuration?

  It gives the number of electron shells
• If an element is not conductive and its oxide is acidic, what is it classified as?

  Non-metal
• What is the maximum number of electrons the second and third shells can hold?

  8
• Why are elements in the same group of the Periodic Table similar in their chemical properties?

  They have the same number of electrons in their outer shell
• What is the general characteristic of metals regarding electrical conductivity?

  They are generally conductive
• What is the significance of the red line in the Periodic Table?

  It divides metals from non-metals

  
• What is the electronic configuration of an element in group 3?

  3 electrons in the outer shell
• Why do elements in the same period have the same number of electron shells?

  They are arranged in rows called periods
• What is the general characteristic of non-metals regarding electrical conductivity?

  They are not conductive (excluding graphite)
• What is the relationship between the group number and the number of electrons in the outer shell?

  The group number gives the number of electrons in the outer shell
• What is the electronic configuration of an element in period 1?

  1 shell of electrons
• Why do elements in the same group have similar chemical properties?

  They have the same number of electrons in the outer shell
• What is the electronic configuration of helium?

  2
• Why are noble gases unreactive?

  They have a stable arrangement of electrons
• What is the maximum number of electrons the first shell can hold?

  2
• What is the relationship between the period number and the number of electron shells?

  The period number gives the number of electron shells
• What is the general characteristic of metals regarding the formation of ions?

  They form positive ions
• What is the general characteristic of non-metals regarding the formation of ions?

  They do not form positive ions
• What is the general characteristic of metals regarding their position in the Periodic Table?

  They are found to the left and towards the bottom
• What is the general characteristic of non-metals regarding their position in the Periodic Table?

  They are found towards the right and top
• What is the general characteristic of metals regarding their oxide character?

  Their oxides are basic
• What is the general characteristic of non-metals regarding their oxide character?

  Their oxides are acidic
• Why do elements in the same group have similar chemical properties?

  They have the same number of electrons in the outer shell
• What is the general characteristic of metals regarding their electrical conductivity?

  They are generally conductive
• What is the general characteristic of non-metals regarding their electrical conductivity?

  They are not conductive (excluding graphite)