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प्रश्न
The modern periodic table is divided into which blocks?
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उत्तर
The modern periodic table is divided into s-block, p-block, d-block, f-block.
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संबंधित प्रश्न
Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
What is meant by a period, in a periodic table?
How many periods and groups are there in the long form of periodic table?
Give two example of group 1 elements.
Give two example of group 17 elements.
where should hydrogen be placed in the modern periodic table? Give reason for your answer.
Explain why, the noble gases are placed in a separate group.
Would you place the two isotopes of chlorine, CI-35 and CI-37 in different slots because of their different atomic masses or in the same slot because their chemical properties are the same? Justify your answer.
What is a group in the periodic table?
In what respects do the properties of group 1 elements differ from those of group 17 elements? Explain with examples by taking one element from each group.
What are the advantages of the periodic table?
Define:
Periodic table
Name the type of elements which have outermost shell incomplete.
State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
Write a short note.
Position of isotopes in the Mendeleev’s and the modern periodic table.
An element A has 2 electrons in its fourth shell. State its electronic configuration.
Define the atomic size.
Give the symbol and valency of the following element and radical.
Sodium
Give the symbol and valency of the following element and radical.
Bicarbonate
Give the symbol and valency of the following element and radical.
Nitrate
Give the symbol and valency of the following element and radical.
Bisulphate
Give the symbol and valency of the following element and radical.
Carbonate
Give the chemical formula of sodium nitrate
Give the chemical formula of sodium sulphite
Give the chemical formula of ammonium sulphate
State the number of elements in Period 3 of the Periodic Table.
State any five features of modern periodic table.
______ is the longest period in the periodical table.
______ forms the basis of the modern periodic table.
The scientist who propounded the modern periodic law is ______.
The element which has the least tendency to lose electrons is ______
On moving from left to right in a period in the periodic table, the size of the atom ______
The inert gas which lies in the third period is ______
Which of the following elements would lose an electron easily?
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.
Answer the following in respect of element \[\ce{_16^32S}\].
Give its formula with hydrogen.
