If your question is of the core of the Earth, it is suspected to be made of iron and nickel.
Answer:
Diamond
Explanation:
As light moves from a less dense medium to a denser medium it slows down.
This is because the wave length of the light reduces. The denser the medium the less the wavelength. Diamond is the most dense solid among the provided choices thus light travelling through it has the least wavelength.
Covalent bonds form when electrons are shared between two nonmetals.
Answer:
I think it's the second answer --If you increase the acidity..
I hope answer I can answer your question!
