Arsenic

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This editable Main Article is under development and subject to a disclaimer.

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| Arsenic | 74.92160(2) |

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| As

1s22s22p63s23p63d104s2 4p3 |
[ ? ] | Metalloid:

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Properties:
Steel-gray, brittle metal
Hazard:
Poisonous

Arsenic is a chemical element, having the chemical symbol As. Its atomic number (the number of protons) is 33. It has a standard atomic weight of 74.9216 g•mol −1 and is a solid in its elemental form.

Arsenic is considered to be a member of the "Metalloid" class of element. At a pressure of 1 atm (101.325 kPa), it has a sublimation point of 613 °C and, at a pressure of 28 atm, it has a melting point of 817 °C.[1]

## References[edit]

1. ↑ Note: If the boiling point was also measured at a pressure of 28 atm, it would be higher than the melting point.