How many elements did mendeleev’s original periodic table have?

hi there

the answer to this is : 50 elements

EXPLATION:

The concept of a systematic measure for atomic weights greatly contributed to the success of Mendeleev's periodic table. In (1864) in with about 50 elements known,The mass of an atom in theA.M.U. is roughly equal to the sum of the number of protons and neutrons in the nucleus in the atom . The A.M.U. is used to express the relative masses of, and thereby differentiate between, various isotopes of elements.

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FaithRawlins14

format change of dna.  

i think the answer is gold im not entirely sure