Who is the Father of the Periodic Table and how did he arrange the elements?

Father of periodic table is Dmitri Mendeleev.

He arranged the elements in eight groups but left no gaps for undiscovered elements.

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so what is the problem with your lab report and whats the subject of the lab report? i will you

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.