Yes. Please note that when astronomers speak about "metals", or the "metallicity of a star", they usually mean any element other than hydrogen or helium - so these "metals" include carbon, oxygen, etc. However, they also include metals in the more common sense.
M stars contan metal oxides molecules.
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The distribution of metals (In astronomy, that is any element other that hydrogen and helium) is reliant of the population stars. (See related question) Metal rich stars, population I stars, are the latest "breed" of stars, whereas population III stars are the oldest and are classed as metal free stars. So the furthest galaxies are likely to be formed from the initial gases from the big bang and will be metal free stars,
The oldest stars are metal poor because they formed before there had been many supernova explosions to create and scatter metals into interstellar medium. Those stars formed long ago when the galaxy was young and motions were not organized into a disk, so the stars tended to take up randomly shaped orbits, many of which are quite elongated and eccentric. Consequently, today, the most metal poor stars tend to follow the most eccentric orbits.
No. Planets are objects made of some combination of rock, gas, and/or metal that orbit stars.
Population 1 stars are metal rich stars. See related question.
it increases
No. Emo has nothing to do with Heavy Metal... it was originally a spinoff of Hardcore Punk.
By buying the metal sonic dlc.
Hydrogen and Helium with a small amount of lithium. These are referred to as population III stars or low metal stars. See related question
No
Population I (High metal content) stars are generally found in the arms of spiral galaxies, whereas population II (Medium metal content) are generally found towards the centre of the galaxies.