Which fact was most likely discovered between the time of mendeleev’s table and the time of moseley’s table that moseley develop his version? atomic mass is the average mass of different samples of the same element. different elements can have similar chemical properties even if their atomic masses are different. the number of protons in an atom is different than the atom’s total mass. protons strongly affect an element’s atomic mass, while the electrons in atoms do not.

the answer is false?

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.