EASY
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Atomic weight can be calculated as the product of equivalent weight and .

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Important Questions on Classification of Elements - the Periodic Table

EASY
What were the criteria used by Mendeleev in creating his Periodic Table?
MEDIUM
An example for Mendeleev’s anomalous series is _____
HARD
In Mendeleev's periodic table, gaps were left for the elements to be discovered later on. An element which found a vacant place in the periodic table later on is
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The element named as Eka-boron by Mendeleev was later named as _____.
HARD
_____ was placed in the group of halogens in Mendeleev's periodic table? (Manganese / Magnesium/ Nitrogen)
HARD
Which of the following is/are achievement(s) of Mendeleev's periodic table?
EASY

Among the following elements, _____ does not fit in Dobereiner's traid.

F,Cl, Br, I

HARD
In Mendeleev's periodic table, gap was not left for one of the following elements. This element is:
HARD

_____ are dissimilar elements have been placed in the same group in the Mendeleev's periodic table.

A: Cu, Ag and Au

B: Cu, Hg and Au

C: Co, Ag and Au

Enter your correct answer as A, B or C.

MEDIUM
_____ was the basis of the classifications proposed by Dobereiner, Newlands and Mendeleev.
EASY
Which of the following is incorrect explanation about Mendeleev's periodic law?
EASY
One mineral (metal) presents in major quantity in milk is _____.
HARD
An element X forms an oxide X2O3. In which group of Mendeleev's periodic table is this element placed?
MEDIUM
The elements having the same number of _____ occur at regular intervals in the periodic table. (valence electrons / electrons)
MEDIUM
Noble gases belongs to group _____ of periodic table. (16, 17, 18)
EASY

 _____(Mendeleev/Moseley) law states that the properties of elements are periodic function of their atomic masses.

EASY
Vertical columns of elements in the periodic table are called _____.
EASY
Mendeleev’s periodic table is based on atomic _____. (number / mass)