Bromine Element  Number 35 Br 

Typical Bromine vial

 Br 35 Halogen,  AW:79.904  MP: 19  BP:137.8  D:3.10

Bromine is a reddish liquid at room temperature, one of two elements that are liquid at room temperature. Bromine is  a halogen or, "salt making" element. Bromine is a rather scarce element, but has a number of industrial uses. Under super high pressure( 550,000 atmospheres, 55GPa) Bromine can convert to a metallic form.

When I live in Florida, it was common to see houses covered in tents, and fumigated  with a Bromine compound, it can be a powerful poison. Bromine is used in flame retardant materials, and also a gasoline additive.

Bromine was used in medicines and food additives, but have mostly been replaced,  although some soft drinks contain Brominated vegetable oils.

Bromine is also used in dyes, drilling fluids, and others. One notable use is the reduction of Mercury emissions from coal fired power plants. Bromine is a toxic substance, and must be handled carefully, lead lined containers are generally used to transport Bromine.

This small Vial of Bromine is encase in epoxy. The photo shows a tiny break in the vial, over a few weeks the bromine escaped the vial reacted with the epoxy, swelled and burst the glass bottle. Later in a masone jar with a metal canning lid, the Bromine began eating through the lid. I have encased it now in glass jar with a special lid with lead sheet. I believe Bromine to be one of the most dangerous elements to collect.

 Krypton Element Number 36 Kr

Krypton is a noble gas element, and found in the atmosphere in trace amounts. The gas can be isolated using fractional distillation. Krypton is the real element behind the fictional material Kryptonite, which could disable superman.  

Krypton is nearly inert, but forms at least 2 compounds with, surprise! Fluorine. The main uses of Krypton are Neon signs and arc lamps. Krypton is also used mixed with Fluorine in lasers. Some of the younger guys around like to buy Krypton headlight bulbs for customs cars.

In 1960 the standard for the meter was determined by  1,650,763.73 light waves from Kr86 isotope in a vacuum, hyperfine atomic transition. later this was replaced with a standard involving the speed of light.

Krypton is non toxic, and solidified is a white crystalline material. Krypton melts at  -251F but because of the expense in production is not viable as a cryogen. As with all the noble gasses I own a gas discharge tube of this element.

 

This Krypton gas discharge tube is not powered up. This is what they look like when not lit up. I have packed my transformer and will not see it again for a few months. so for now I can only show the tube. 

Kr 36 Gas,  AW: 83.798  D@BP: 2.41  MP:-251.25  BP:-244.12