There appears to be a ROCK AT THE bottom of the ocean what is that called?​

a rock

Explanation:

The sediments at the bottom of the ocean are clastic sediments, which are particles that have been eroded and broken down from other rocks and combined with a lot of organic material—skeletons, shells and other remains from creatures that either lived in the water column of the ocean or on the seafloor.    

Explanation:

If this isn't the answer then its probably patricks house.

where is the diagram?

if you insert the diagram ill be able to you

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.