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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, which are the metals among the first ten elements?
How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
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.
Fill in the following blank with suitable word:
The basis for modern periodic table is ...............
Give two example of group 17 elements.
What is the name of those elements which divide metals and non-metals in the periodic table?
The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is:
(a) P
(b) Q
(c) R
(d) S
Which of the following statement about the modern periodic table is correct?
(a) It has 18 horizontal rows known as periods.
(b) It has 7 vertical columns known as periods.
(c) It has 18 vertical columns known as groups.
(d) It has 7 horizontal rows known as groups.
State how the valency of elements varies in a group of the periodic table?
(b) What is the number of elements is 3rd period, the modern periodic table?
In the modern Periodic Table, why does cobalt with higher atomic mass of 58.93 appear before nickel having lower atomic mass of 58.71?
What are the advantages of the periodic table?
What are the periods in a periodic table? Give two characteristics of each.
Name two elements in Alkaline earth metals.
Name two elements in Inert gas.
Answer the following in respect of element `31/15 P `
To which group and period does it belong?
Fill in the blank:
The horizontal rows in the periodic table are called _____________.
State the modern periodic law for classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
State the modern periodic law.
How many periods and groups are there in the modern periodic table?
What is the number of elements in the 1st period?
Give the symbol and valency of the following element and radical.
Bicarbonate
Give the symbol and valency of the following element and radical.
Bisulphate
Give the chemical formula of sodium bicarbonate
Fill in the blank:
The element lithium in the Modern Periodic Table with valency 1+ belongs to the group ______.
Distinguish between:
s-block - p-block
Elements in the modern periodic table are arranged in ______groups and______ periods.
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.
State any five features of modern periodic table.
______ forms the basis of the modern periodic table.
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 ______
The longest period of the Modern Periodic Table is period.
Which of the following is the outermost shell for elements of period 2?
“Hydrogen occupies a unique position in Modern Periodic Table”. Justify the statement.
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.
An element ‘M' has 50% of the electrons filled in the 3rd shell as in the 2nd shell. The atomic number of ‘M’ is ______.
Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
