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Praseodymium (Pr) 1. Basic Information Atomic Number 59 Symbol Pr Atomic Weight 140.91 g/mol Categor...

Serium 1. Basic Information Atomic Number 58 Symbol Ce Atomic Weight 140.12 g/mol Electron Configura...

Lantanum 1. Basic Information Atomic Number 57 Symbol La Atomic Weight 138.91 g/mol Category Rare ea...

Radium 1. Basic Information Atomic Number 88 Symbol Ra Atomic Weight 226.0254 g/mol Category Alkalin...

Barium (Ba) 1. Basic Information Atomic Number 56 Symbol Ba Atomic Weight 137.33 g/mol Category Alka...

Strontium 1. Basic Information Atomic Number 38 Symbol Sr Atomic Weight 87.62 g/mol Category Alkalin...

Calcium (Ca) 1. Basic Information Atomic Number 20 Symbol Ca Atomic Mass 40.08 g/mol Class Alkaline ...

Magnesium (Mg) 1. Basic Information Atomic Number 12 Symbol Mg Atomic Weight 24.305 g/mol Electron C...

Beryllium (Be) 1. Basic Information Atomic Number 4 Symbol Be Atomic Weight 9.0121831 g/mol Electron...

Fransium (Fr) 1. Basic Information Atomic Number 87 Symbol Fr Atomic Mass 223 g/mol (most stable iso...