Br- (36) 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6

Bromine(BR) 1s(1) 2s(2) p(6), 3s(2) p(6),3d(10)4s(2), p(5)

Explanation:

Group 7A elements have a -1 electron configuration.

Beginning at the top left and going across the rows of the periodic table provides a method for remembering the order

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p.

well in order to answer this question you have to provide more information < 3

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).