Bromine

Atomic Number is 35

Symbol is Br

Atomic Mass is 79.904

Discovered in 1825

Antoine Balard and Carl Jacob Lowig discovered it

It can be found in sea weed and mineral water springs

A red/brown colored Liquid

It can be used in picture taking, medical applications, and early sedatives.
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Two Isotopes are 79Br and 77Br. 79Br is used in fission products. 77Br is used as a neutron deficient.

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