Alkaline Earth Metals

1
Alkaline Earth Metals
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Basics

• Beryllium(4), Magnesium(12), Calcium(20),
  Strontium(38), Barium(56), and Radium(88)
• Make up group 2
• Valence Electrons-2
• Silvery luster
• Ductile and malleable

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Beryllium (4)

• Symbol- Be
• Discovered-1798
• Discoverer-Fredrich Wohler
• Name origin- The Mineral Beryl
• Uses- spacecraft, missiles, and aircrafts
• P4
• N5
• E4

4
Magnesium (12)

• Symbol- Mg
• Discovered-1808
• Discoverer- Sir Humphrey Davy
• Name Origin- Magnesia (City)
• Uses-Airplanes and missiles
• Obtained From- Sea Water
• P12
• N12
• E12

5
Calcium (20)

• Symbol- Ca
• Discovered-1808
• Discoverer- Sir Humphrey Davy
• Name origin-Latin word Calcis (lime)
• Uses- life forms from bones and shells
• Obtained from chalk and limestone
• P20
• N20
• E20

6
Strontium (38)

• Symbol- Sr
• Discovered-1790
• Discoverer- A. Crawford
• Name origin- Strontian (Scottish town)
• Uses-flares, fireworks
• P38
• N50
• E38

7
Barium (56)

• Symbol-Ba
• Discovered-1808
• Discoverer-Sir Humphrey Davy
• Name Origin-Greek word Barys (heavy)
• Uses-Medical applications
• P56
• N81
• E56

8
Radium (88)

• Symbol-Ra
• Discovered-1898
• Discoverer-Pierre and Marie Curie
• Name origin- Latin word radius (ray)
• Uses- Treating Cancer
• P-88
• N-136
• E-88

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Facts

• Second most reactive group (next to Alkali
  metals)
• Average Hardness (Mohs scale)- 2.1
• Density (g/cm3)ranges from 1-5
• Good heat and electrical conductors
• Most abundant Alkaline Earth metals- Calcium and
  Magnesium
• Highly reactive metallic elements

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Facts Continued

• Always found as compounds
• Reactivity increases as the atomic number
  increases