MEDIUM
10th CBSE
IMPORTANT
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The Newlands' law of octaves for the classification of elements was found to be applicable only up to the element :
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Important Questions on Periodic Classification Of Elements
MEDIUM
10th CBSE
IMPORTANT
According to Mendeleev's periodic law, the elements were arranged in the periodic table in the order of:
MEDIUM
10th CBSE
IMPORTANT
The three elements having chemical symbols of Si, B and Ge are:
HARD
10th CBSE
IMPORTANT
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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10th CBSE
IMPORTANT
The three imaginary elements X, Y and Z represent a Dobereiner's triad. If the atomic mass of the element X is 14 and that of element Y is 46, then the atomic mass of element Z will be:
HARD
10th CBSE
IMPORTANT
The atomic numbers of four elements and are and respectively. Out of these, the element known as metalloid is:
MEDIUM
10th CBSE
IMPORTANT
Which of the following statement is correct in regard to the classification of elements?
MEDIUM
10th CBSE
IMPORTANT
Which of the following statement about the periodic table is correct.
HARD
10th CBSE
IMPORTANT
An element forms an oxide . In which group of Mendeleev's periodic table is this element placed?
