Name the Russian chemist who stated that the properties of elements are a periodic function of their atomic masses?
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Which of the following is a CORRECT statement?
Which of the following elements replaced eka-Aluminium in Mendeleev's Periodic table?
15% of an alloy was silver. If in a quantity of alloy there was 51 g of silver, what was the quantity of the other elements in the alloy?
Except Helium, all noble gases have how many electrons in the outermost shell?
In the modern periodic table, which of the two periods contain 8 elements each?
In the Modern Periodic Table elements present in the same period will have the same
Which of the following is NOT a property of acids?
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