salazarangelina141 salazarangelina141

15-02-2021
Chemistry

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what element has the symbol of He

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littlemachinebjj littlemachinebjj

15-02-2021

Answer:

Helium

Explanation:

Physical properties

Atomic mass: 4.0026

Density: 0.18 g/cm3

Group: Noble gas

Electrons: 1s2

Melting point: 0.95 K

Boiling point: 4.22 K

Discovered: 1868

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Chaitany Chaitany

15-02-2021

Answer:

helium is the full form he

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