Which of the following statements about \( \mathrm{P} \) Mendeleev'...

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Which of the following statements about
\( \mathrm{P} \)
Mendeleev's periodic table is/are incorrect?
W
(1) Helped in correcting the atomic wt. of \( \mathrm{Be} \), In, \( \mathrm{U}, \mathrm{Au} \) and \( \mathrm{Pt} \).
(2) Position of Lanthanides and Actinides were fixed
(3) Position of isotopes were not fixed.
(4) All the elements follow the increasing order of atomic weights.
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