how is the problem regarding the position of cobalt and nickel in Mendeleev periodic table resolved in modern periodic table
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according to modern and periodic law, elements are arranged in the order of increasing atomic numbers.the atomic number of cobalt is 27 and nickel is 28 in this way they resolved in modern periodic table
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(i) Gold and Platinum occur in free state.
(ii) They are noble metals, hence they are least reactive.
(iii) They are not affected by air, water and other
natural factors.
(iv) Hence, pure gold and platinum always glitter.
Explanation:
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