Chemistry
You are provided with a Periodic Table below :
(i) What is this Periodic table known as?
(ii) Give the Periodic Law for the above Periodic table.
(iii) From the above Periodic table, predict the formula for the (i) oxide and (ii) hydride of Sulphur (S).
(iv) State one defect of this table.
(v) What is the basis of the Modern periodic table?
Periodic Table
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Answer
(i) The table is known as Mendeleev's periodic table.
(ii) The Periodic Law for the above periodic table is that physical and chemical properties of elements are a periodic function of their atomic masses.
(iii) (i) SO3
(ii) SH2
(iv) One defect of this table was the grouping of chemically dissimilar elements. Elements such as copper and silver bear no resemblance to alkali metals (lithium, sodium, etc.) but they have been placed together in the first group.
(v) Modern periodic table is based on the Modern Periodic Law which states that — Physical and chemical properties of elements are periodic function of their atomic number.
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