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Name: Zirconium
Symbol: Zr
Atomic Number: 40
Atomic Mass: 91.224 amu
Melting Point: 1852.0 °C (2125.15 K, 3365.6 °F)
Boiling Point: 4377.0 °C (4650.15 K, 7910.6 °F)
Number of Protons/Electrons: 40
Number of Neutrons: 51
Classification: Transition Metal
Crystal Structure: Hexagonal
Density @ 293 K: 6.49 g/cm3
Color: Grayish

Atomic Structure
|   |
Number of EnergyLevels: 5
First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 18
Fourth Energy Level: 10
Fifth Energy Level: 2 |
Date of Discovery: 1789
Discoverer: Martin Klaproth
Name Origin: zircon (mineral)
Uses: nuclear applications
Obtained From: zircon, baddeleyite

Basic Information

Name: Hydrogen
Symbol: H
Atomic Number: 1
Atomic Mass: 1.00794 amu
Melting Point:-259.14 °C (14.009985 K, -434.45203 °F)
Boiling Point: -252.87 °C (20.280005 K, -423.166 °F)
Number of Protons/Electrons: 1
Number of Neutrons: 0
Classification: Non-metal
Crystal Structure: Hexagonal
Density @ 293 K: 0.08988 g/cm3
Color: colorless

Atomic Structure
|   |
Number of Energy Levels: 1
First Energy Level: 1 |
Date of Discovery: 1766
Discoverer: HenryCavendish
Name Origin: From the Greek words hudôr (water) and gennan (generate)
Uses: Balloons, metal refining
Obtained From: mines, oil, gas wells

Name: Beryllium
Symbol: Be
Atomic Number: 4
Atomic Mass: 9.012182 amu
Melting Point: 1278.0 °C (1551.15 K, 2332.4 °F)
Boiling Point: 2970.0 °C (3243.15 K, 5378.0 °F)
Number of Protons/Electrons: 4
Number of Neutrons: 5Classification: Alkaline Earth
Crystal Structure: Hexagonal
Density @ 293 K: 1.8477 g/cm3
Color: gray

Atomic Structure
|   |
Number of Energy Levels: 2
First Energy Level: 2
Second Energy Level: 2 |
Date of Discovery: 1798
Discoverer: Fredrich Wohler
Name Origin: From the mineral beryl
Uses: spacecraft, missiles, aircraft
Obtained From: beryl, chrysoberyl

Name: MagnesiumSymbol: Mg
Atomic Number: 12
Atomic Mass: 24.305 amu
Melting Point: 650.0 °C (923.15 K, 1202.0 °F)
Boiling Point: 1107.0 °C (1380.15 K, 2024.6 °F)
Number of Protons/Electrons: 12
Number of Neutrons: 12
Classification: Alkaline Earth
Crystal Structure: Hexagonal
Density @ 293 K: 1.738 g/cm3
Color: grayish

Atomic Structure
|   |
Number of Energy Levels: 3
First EnergyLevel: 2
Second Energy Level: 8
Third Energy Level: 2 |
Date of Discovery: 1808
Discoverer: Sir Humphrey Davy
Name Origin: Magnesia (City)
Uses: airplanes, missiles
Obtained From: sea wate

Name: Calcium
Symbol: Ca
Atomic Number: 20
Atomic Mass: 40.078 amu
Melting Point: 839.0 °C (1112.15 K, 1542.2 °F)
Boiling Point: 1484.0 °C (1757.15 K, 2703.2 °F)
Number ofProtons/Electrons: 20
Number of Neutrons: 20
Classification: Alkaline Earth
Crystal Structure: Cubic
Density @ 293 K: 1.55 g/cm3
Color: Silvery

Atomic Structure
|   |
Number of Energy Levels: 4
First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 8
Fourth Energy Level: 2 |
Date of Discovery: 1808
Discoverer: Sir Humphrey Davy
Name Origin: From the latin word calcis(lime)
Uses: life forms for bones and shells
Obtained From: chalk, limestone, marble. 3.5% of crust

Name: Cesium
Symbol: Cs
Atomic Number: 55
Atomic Mass: 132.90546 amu
Melting Point: 28.5 °C (301.65 K, 83.3 °F)
Boiling Point: 678.4 °C (951.55005 K, 1253.12 °F)
Number of Protons/Electrons: 55
Number of Neutrons: 78
Classification: Alkali Metal
Crystal Structure: CubicDensity @ 293 K: 1.873 g/cm3
Color: silver
British Spelling: Caesium
IUPAC Spelling: Caesium

Atomic Structure
|   |
Number of Energy Levels: 6
First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 18
Fourth Energy Level: 18
Fifth Energy Level: 8
Sixth Energy Level: 1 |
Date of Discovery: 1860
Discoverer: Fustov Kirchoff
Name Origin: From the Latin word...
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