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प्रश्न
“Hydrogen occupies a unique position in Modern Periodic Table”. Justify the statement.
उत्तर
Hydrogen occupies a unique position in the modern periodic table because of the following reasons:
- Electronic configuration of hydrogen is similar to that of alkali metals as both have one electron in the outermost shell.
- Properties of hydrogen is similar to that of the halogen elements as both have the same tendency of accepting electrons to complete their octet electronic configuration.
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संबंधित प्रश्न
The position of three elements A, B and C in the Periodic Table are shown below –
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Group 16
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Group 17
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−
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−
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A
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−
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−
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B
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C
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(a) State whether A is a metal or non-metal.
(b) State whether C is more reactive or less reactive than A.
(c) Will C be larger or smaller in size than B?
(d) Which type of ion, cation or anion, will be formed by element A?
What is periodicity in properties of elements with reference to 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.
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.
On the basis of electronic configuration, how will you identify chemically similar elements?
What is the usual number of valence electrons and valency of group 18 elements of the periodic table?
What are the periods in a periodic table? Give two characteristics of each.
What are horizontal rows and vertical columns in a periodic table known as?
What are groups and periods in the modern periodic table?
Which of the following elements would lose an electron easily?
