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Get Answers to all your Questions
- Home
- Engineering
- Match the followings and choose the correct option: List-I &
- #Chemistry
- #Classification of Elements and Periodic table
- #National Eligilibility Cum Entrance Test
- #Engineering
- #Joint Entrance Examination Main
Match the followings and choose the correct option:
List-I List-II
(i) 1s22s22p63s23p6 (a) Halogen
(ii) 1s22s22p63s23p4 (b) Chalcogen
(iii) 1s22s22p63s1 (c) Alkali
(iv) 1s22s22p63s23p5 (d) Noble gas
(i) (ii) (iii) (iv)
(a) (b) (c) (d)
(i) (ii) (iii) (iv)
(d) (b) (c) (a)
(i) (ii) (iii) (iv)
(b) (c) (a) (d)
(i) (ii) (iii) (iv)
(c) (a) (b) (d)
Answers (1)
Classification of Elements : p-block -
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The elements whose last electron enters into any p-orbital are known as p-block elements.
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The general outer electronic configuration for these elements is ns2np1-6.
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Group 13 of III A have one electron in p-orbital whereas group 18 or VIII A (inert gas) have 6 electrons in their outer p-orbitals. The outer p-orbitals in an inert gas are fully-filled with electrons.
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They include both metals and nonmetals but there is a regular change from metallic to non-metallic character as we move from left to right across the period.
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Except F and inert gases, all other elements of this block show variable oxidation states.
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They form covalent compounds mostly like oxides, halides, sulphides, carbonates, etc.
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A number of elements of this block show catenation property and allotropy like C, Si, Ge, S, O etc.
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All halogens have the electronic configuration of the form ns2np5. Chalcogens are also known as oxygen family and they have the general electronic configuration ns2np4. Noble gases have completely filled electronic configurations and have the form ns2np6. Alkali metals are the first elements of the periodic table and they belong to the s-block. They have the general electronic configuration as ns1.
Therefore, Option(2) is correct
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