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प्रश्न
The basis of the classifications proposed by Dobereiner, Newlands and Mendeleev was ______.
उत्तर
The basis of the classifications proposed by Dobereiner, Newlands and Mendeleev was atomic masses
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संबंधित प्रश्न
Rewrite the following statement after correction, if necessary:
Isotopes are the elements of the same group.
The element which can from an acidic oxide should be the one whose atomic number is:
(a) 6
(b) 16
(c) 12
(d) 19
An element X is in group 2 of the periodic table What will be the formula of its chloride?
Find the neutral atom in the periodic table which has the same number of electrons as K+ and Cl−. What is this number?
In which block of the modern periodic table are the nonmetals found?
Elements belonging to the same group have the same valency.
State whether true or false. If false, correct the statement.
Metals can gain electrons.
Moseley’s periodic table is based on atomic mass.
What is the atomic number of elements of period 3 and group 17 of the Periodic Table?
An element X combines with oxygen to form an oxide XO. This oxide is electrically conducting. Write the formula of the compound formed when X reacts with chlorine.
