Write true or false for the following statements:

Electronic configuration of hydrogen resembles that of alkaline earth metals.

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In order to fit elements into his table, Newlands adjusted three elements in the same slot, but also put some unlike elements in the same slot.

Write true or false for the following statements:

In Mendeleev’s periodic table, elements were arranged in the order of their increasing atomic masses and it was also observed that there occurs a periodic recurrence of elements with similar physical and chemical properties.

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In 1913, Dmitri Ivanovich Mendeleev showed that the atomic number of an element is a more fundamental property than its atomic mass.

Write true or false for the following statements:

Na, Mg, Li, Al, Si, F, P and Cl belong to the third period of the Modern periodic table.