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Alkaline-earth Metals


KEY ELEMENT CLASSIFICATION
Chemical Element Symbol Key
2
4
9.01218
Name: Beryllium
Symbol: Be
Atomic Weight: 9.01218
Atomic Number: 4
Element Classification: Alkaline-earth Metal
Discovered By: Louis-Nicholas Vauquelin
Discovery Date: 1798 (France)
Name Origin: Greek: beryllos, 'beryl' (a mineral).
3
12
24.305
Name: Magnesium
Symbol: Mg
Atomic Weight: 24.305
Atomic Number: 12
Element Classification: Alkaline-earth Metal
Discovered By: Sir Humphrey Davy
Discovery Date: 1808 (England)
Name Origin: Magnesia, ancient city in district of Thessaly, Greece.
4
20
40.078
Name: Calcium
Symbol: Ca
Atomic Weight: 40.078
Atomic Number: 20
Element Classification: Alkaline-earth Metal
Discovered By: Sir Humphrey Davy
Discovery Date: 1808 (England)
Name Origin: Latin: calx, calcis (lime).
5
38
87.62
Name: Strontium
Symbol: Sr
Atomic Weight: 87.62
Atomic Number: 38
Element Classification: Alkaline-earth Metal
Discovered By: A. Crawford
Discovery Date: 1790 (Scotland)
Name Origin: The Scottish town, Strontian.
6
56
137.327
Name: Barium
Symbol: Ba
Atomic Weight: 137.327
Atomic Number: 56
Element Classification: Alkaline-earth Metal
Discovered By: Sir Humphrey Davy
Discovery Date: 1808 (England)
Name Origin: Greek: barys (heavy or dense).
7
88
226.0254
Name: Radium
Symbol: Ra
Atomic Weight: 226.0254
Atomic Number: 88
Element Classification: Alkaline-earth Metal
Discovered By: Pierre and Marie Curie-Sklodowska
Discovery Date: 1898 (France/Poland)
Name Origin: Latin: radius (ray).


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