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Use the periodic table to answer the following question. Identify an element that would tend to gain two electrons.

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प्रश्न

Use the periodic table to answer the following question.

Identify an element that would tend to gain two electrons.

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उत्तर १

An element is likely to gain two electrons if it needs only two electrons to attain the stable noble gas configuration. Thus, the general electronic configuration of such an element should be ns2 np4. This is the electronic configuration of the oxygen family.

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उत्तर २

Element belonging to oxygen family (group 16) e.g., oxygen.

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अध्याय 3: Classification of Elements and Periodicity in Properties - EXERCISES [पृष्ठ ९७]

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एनसीईआरटी Chemistry - Part 1 and 2 [English] Class 11
अध्याय 3 Classification of Elements and Periodicity in Properties
EXERCISES | Q 3.27 - (c) | पृष्ठ ९७

संबंधित प्रश्न

Write the atomic number of the element present in the third period and a seventeenth group of the periodic table.


Use the periodic table to answer the following question.

Identify an element with five electrons in the outer subshell.


Use the periodic table to answer the following question.

Identify an element that would tend to lose two electrons.


Use the periodic table to answer the following question.

Identify the group having metal, non-metal, liquid as well as gas at room temperature.


Assign the position of the element having an outer electronic configuration in the periodic table.

ns2 np4 for n = 3


Assign the position of the element having an outer electronic configuration in the periodic table.

(n - 1)d2 ns2 for n = 4


Write the outer electronic configuration of the following using the orbital notation method. Justify.

Ge (belongs to period 4 and group 14)


Write the outer electronic configuration of the following using the orbital notation method. Justify.

Cu (belongs to period 4 and group 11)


Answer the following question.

The electronic configuration of some element is given below:

1s2 2s2 2p6

In which group and period of the periodic table the element is placed?


Answer the following question.

For s-block and p-block elements show that the number of valence electrons is equal to its group number.


Consider the oxides Li2O, CO2, B2O3.

Which oxide would you expect to be the most basic?


Consider the oxides Li2O, CO2, B2O3.

Which oxide would be the most acidic?


The period number in the long form of the periodic table is equal to ______.


Identify the group and valency of the element having atomic number 119. Also predict the outermost electronic configuration and write the general formula of its oxide.


How would you explain the fact that first ionisation enthalpy of sodium is lower than that of magnesium but its second ionisation enthalpy is higher than that of magnesium?


E.N. of Si is ______. (Covalent radius of Si = 1.175 Å)


\[\ce{_92U^235}\] is a member of VI B group. The new element formed by the emission of α-particle will be a member of ______ group.


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