What is an Zirconium (Its an element) . in your own words but be more detailed about what you say. If you don't know it, look it up and reword the meaning.

Zirconium is a silver-gray transition metal, a type of element that is malleable and ductile and easily forms stable compounds. It is also highly resistant to corrosion. Zirconium and its alloys have been used for centuries in a wide variety of ways.  

It is commonly used in corrosive environments. Zirconium alloys can be found in pipes, fittings, and heat exchangers, according to Chemicool. Zirconium is also used in steel alloys, colored glazes, bricks, ceramics, abrasives, flashbulbs, lamp filaments, artificial gemstones, and some deodorants, according to Minerals Education Coalition.

Other uses for zirconium include catalytic converters, furnace bricks, lab crucibles, surgical instruments, television glass, removing residual gases from vacuum tubes, and as a hardening agent in alloys such as steel, according to Lenntech. Also, zirconium carbonate is used to treat poison ivy, according to the Jefferson Laboratory.

Zirconium has been found in S-type stars, the sun, meteorites, and in lunar rocks, according to the Los Alamos National Laboratory. Lunar rocks appear to have a surprisingly high zircon content compared to terrestrial rocks, according to an analysis of lunar rock samples from the various Apollo missions.  

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.

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