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प्रश्न
Select the appropriate options and complete the following paragraph:
(metals, non-metals, metalloids, four, seven, s-block, p-block, d-block, f-block).
On the basis of electronic configuration, elements in the modern periodic table are classified Into ______ blocks. Groups 1 and 2 elements are included in ______ and all these elements are metals. (except Hydrogen). Group 13 to 18 elements are included in ______. This block contains metals, non-metals and metalloids. Group 3 to 12 elements are included in ______ and all the elements are ______ elements shown at the bottom of the periodic table i.e. Lanthanides and Actinides constitute ______ and all these elements are metals.
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उत्तर
On the basis of electronic configuration, elements in the modern periodic table are classified Into four blocks. Groups 1 and 2 elements are included in s-block and all these elements are metals. (except Hydrogen). Group 13 to 18 elements are included in p-block. This block contains metals, non-metals and metalloids. Group 3 to 12 elements are included in d-block and all the elements are metals elements shown at the bottom of the periodic table i.e. Lanthanides and Actinides constitute f-block and all these elements are metals.
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संबंधित प्रश्न
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?
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.
On which side of the periodic table will you find metals?
Is it possible to have an element having atomic number 1.5 placed between hydrogen and helium?
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same period of the periodic table?
Consider the following elements:
Ca, Cl, Na, I, Li, Ba, Sr, K, Br
Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.
How do the atomic radii of elements change as we go from left to right in a period of the periodic table?
State how the valency of elements varies in a period of the periodic table?
What is a period in a periodic table?
On the basis of electronic configuration, how will you identify the first element of a period?
Explain why, the first period of the periodic table has only two elements whereas second period has eight elements
What are the advantages of the periodic table?
Define:
Periodic table
State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
What is meant in the periodic table by a period?
Name an element of group 18 which can form compounds.
The horizontal rows in a periodic table are called _____.
Give the symbol and valency of the following element and radical.
Sulphite
Give the chemical formula of sodium nitrate
How were elements arranged in the long form of the periodic table or the Modern Periodic Table?
Group 1 and 2 : s block : : group 13 and 18 : _______
The modern periodic table shows the molecular masses of the elements in each frame.
p-block is composed of groups 1 and 2.
Noble gases belong to______ group of the periodic table.
What are groups and periods in the modern periodic table?
The arrangement of elements in the Modem Periodic Table is based on their ______
Element ‘X’ forms a chloride with the formula XCl2, which is solid with a high melting point. X would most likely be in the same group of the periodic table as: ______
In the modern periodic table, elements are arranged according to their ______
The amount of energy released when one or more electrons is added to the neutral atom is ______
Which one of the following elements exhibit maximum number of valence electrons?
Which of the following elements would lose an electron easily?
Which of the following elements does not lose an electron easily?
______ group elements are called alkaline earth metals.
- Write the electronic configuration of element X, given by its symbol as under: \[\ce{^40_20 X}\]
- Determine its position in the modem periodic table.
- What is the nature of its oxide?
- Name one other element of its group.
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.
Name the non-metals in the first twenty elements.
Answer the following in respect of element \[\ce{_16^32S}\].
Give its electronic configuration.
