Periodic System for Chemists

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Alkaline Earth Metals

Reactive metals found in Group 2, forming alkaline solutions when combined with water. Less reactive than alkali metals.

Discovery Period: Late 18th to early 20th century (1774-1950)

Characteristics

  • • Shiny, silvery-white metals
  • • Reactive but less than alkali metals
  • • Two electrons in outer shell
  • • Form +2 ions
  • • Higher melting points than alkali metals
  • • Found in earth minerals

Elements (6)

4
Be
Beryllium
12
Mg
Magnesium
20
Ca
Calcium
38
Sr
Strontium
56
Ba
Barium
88
Ra
Radium

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