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प्रश्न
The scientist who propounded the modern periodic law is ______.
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उत्तर
The scientist who propounded the modern periodic law is Dimitri Mendeleev.
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संबंधित प्रश्न
How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change.
Give two example of group 17 elements.
where should hydrogen be placed in the modern periodic table? Give reason for your answer.
Name the type of elements which have outermost shell incomplete.
Give the symbol and valency of the following element and radical.
Bisulphate
Give the symbol and valency of the following element and radical.
Sulphite
State whether true or false. If false, correct the statement.
Lanthanides and actinides are kept at the bottom of the periodic table because they resemble each other but they do not resemble with any other group elements.
On moving from left to right in a period in the periodic table, the size of the atom ______
Which one of the following elements exhibit maximum number of valence electrons?
Explain giving reason why although the nuclear charge in atoms increases in moving from left to right in a period as well as in moving from top to bottom in a group in the Modern periodic table, but the size of the atoms does not vary similarly in both situations.
