The following chart lists taxonomy classifications for seven organisms. Some have just one classification, while others have a subclassification. Which four classifications best match the classifications of your fossils? Research the classifications if you don’t know their characteristics. Classification
Organism 1 Brachiopoda
Organism 2 Mollusca, Gastropoda
Organism 3 Arthropoda, Trilobita
Organism 4 Chordata, Actinopterygii
Organism 5 Pteridophyta
Organism 6 Nematoda
Organism 7 Ascomycota
Now complete the following table to explain your reasoning for the classification of your fossils.

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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.