5'2 Electron Configuration and the Periodic Table

1
5.2 Electron Configuration and the Periodic Table
2
Blocks

• The blocks of the table are determined by the
  sublevels being filled by electrons.
• The location of an element on the table can be
  determined by its electron configuration.

3
Identify the element

• 3p3
• Phosphorus
• 7s1
• Francium
• 4d6
• Ruthenium
• 5p5
• Iodine
• 3d3
• Vanadium

4
Alkali metals

• Group 1
• Configuration ends in ns1
• Reactive metals
• Form 1 cations
• Not found free in nature
• React with water to form hydrogen gas
• Stored to avoid contact with air and water.

5
Alkaline Earth Metals

• Group 2
• ns2
• Harder, denser, stronger than group 1
• Higher melting points
• Less reactive but still not found free in
  nature.

6
Hydrogen

• Unique element not member of any family
• ns1

7
Transition Elements

• The d-block elements with good metallic
  properties.
• Deviations occur in some electron configurations.
• Less reactive than groups 1 and 2
• Groups 3-12

8
Main group elements

• S block p block

9
Metalloids

• Also called semimetals.
• B, Si, Ge, As, Sb, Te
• Properties of both metals and non-metals.

10
Halogens

• Group 17
• ns2np5
• Most reactive non-metals
• React with metals to form salts

11
Noble Gases

• Group 18
• Unreactive
• ns2np6