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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
Compare and contrast the arrangement of elements in Mendeleev’s periodic Table and the Modern Periodic Table.
Fill in the following blank with suitable word:
Group 17 elements are known as ...............
What is meant by a period, in a periodic table?
Is it possible to have an element having atomic number 1.5 placed between hydrogen and helium?
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
How would the tendency to lose electrons change as we go from left to right across a period of the periodic table?
Explain why All the elements of a group have similar chemical properties.
What is a period in a periodic table?
What are the merits of the modern periodic table of elements?
Define:
Periodic table
Give the group number of following elements present in periodic table
Name the scientist who stated the modern periodic law.
Name two elements in each case:
Transition element
Name the type of elements which have outermost shell complete.
Fill in the blank:
The horizontal rows in the periodic table are called _____________.
An element barium has the atomic number 56. Look up its position in the periodic table and answer the following question.
Is it larger or smaller than caesium (Cs)?
Name the noble gas with 3 shells.
State the main aim of classifying elements. Which is the more fundamental property of elements that is used in the development of Modern Periodic Table? Name and state the law based on this fundamental property. On which side of the periodic table one can find metals, non-metals and metalloids?
State the modern periodic law.
Fill in the blank:
The element lithium in the Modern Periodic Table with valency 1+ belongs to the group ______.
State the number of elements in Period 3 of the Periodic Table.
What are the periods in a periodic table?
Which of the following statements about the Modern periodic table is correct?
Find the correlation:
Mendeleev’s periodic table : atomic mass : : Modern periodic table : _______
p-block is composed of groups 1 and 2.
Right or wrong sentence.
The K and L shells of the elements Na and Mg contain electrons.
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: ______
The amount of energy released when one or more electrons is added to the neutral atom is ______
What is the symbol of the element Tungsten?
Which of the following statements about the Modern Periodic Table is correct:
Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?
The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group?
Noble gases are placed in the ______ group in the modern periodic table.
An element belonging to 3d series of modern periodic table has spin magnetic moment = 5.92 B.M. in +3 oxidation state. The atomic number of elements are ______.
Define periods of modern periodic table.
State the group and period, of the element having three shells with three electrons in valence shell.
Name the following metal:
A metal present in period 3, group 1 of the periodic table.
Give reason for the following:
Inert gases do not form ion.
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
If the electronic configuration of aluminium is 2, 8, 3, how many electrons are there in the outer shell of thallium?
