Question

Can we create oxygen and nitrogen in space or vacuum ?

Answer 1

No, we can't create oxygen and nitrogen in space or vacuum.

Space is almost a perfect vacuum, but gas and dust particles do float around out there.

Answer 2

To create Oxygen and Nitrogen in Vacuum or space first we need to create artificial atmosphere in space. This we call as Space settlement or Space colonization

Actually there is no air as we know it in space. On our earth, air is a mixture of gases, mostly nitrogen and oxygen and some other gases. When you go higher and higher in the atmosphere, there are less and less air molecules. At higher altitudes, the air is thinner (less atoms in the same volume), but the relative amounts of nitrogen and oxygen are the same. This is true until you get about 100km (60 miles) above the surface of the earth. Above that level, light gases like helium and hydrogen are most common.Air thins as you go up in altitude because the majority of air is held close to the earth's surface by gravity. 

Space is almost a perfect vacuum, but gas and dust particles do float around out there. The medium that fills the space in the universe around the stars and galaxies is called Interstellar Medium.Many people imagine outer space to be a complete vacuum, without any material because it has less matter than any vacuum artificially created on earth, but there is matter in space. These regions have very low densities and consist mainly of gas (99%; most of it is hydrogen and some helium) and dust. Interstellar dust is not like the dust that you might find under your bed; it is made of very different substances. These dust particles are extremely small, just a fraction of a micron across, which happens to be approximately the wavelength of blue light waves. The particles are irregularly shaped, and are composed of silicates, carbon, ice, and/or iron compounds.

Answer 3

We can create Oxygen and Nitrogen in space with Space colonization

See this video

Answer 4

We can create oxygen and nitrogen in space or vacuum. There are several ways to do the same but we need resources. Based on cheap and available resources which when provided in the space (or vacuum) we can create it. Some of the ways which we can use are:

1. There are several chemical compounds which contain oxygen and Nitrogen(either in large or small amounts) and can be separated by chemical reactions. 

2. If we have water in a large amount then after electrolysis we can get oxygen and hydrogen. However, it is much costly as requires a large amount of energy.

You already know that the resources in terms of materials and energy in the space is enormous. The alone solar system has enough material and energy to support the earth like population up to billion times the human population that of the earth. Other resources include several billion other stars (which are away from reach) but we need revolutionary methods to take a dig at them for our cause. All these planets and other bodies offer endless supply of resources. Asteroid mining can provide you with enough water and hard materials to make shielding (if thinking for space colonization). 

Now, By the proper use of several known resources, an ecosystem can be generated which can transverse energy from one form to other usable form.