Helium (He)- The Super Element Flashcards by o f | Brainscape

Q

Atomic number

A

2

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Q

Atomic weight

A

4.0026

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Q

Abundance

A

0.008 mg/kg

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Q

Radius

A

140pm

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Q

Melting point

A

-272 °C

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Q

Boiling point

A

-269 °C

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Q

Configuration

A

1s2

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Q

Discovered- by who

A

1895- Ramsay, Cleve & Langlet

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