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

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प्रश्न

Use the periodic table to answer the following question.

Identify an element that would tend to lose two electrons.

थोडक्यात उत्तर
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उत्तर १

An element having two valence electrons will lose two electrons easily to attain the stable noble gas configuration. The general electronic configuration of such an element will be ns2. This is the electronic configuration of group 2 elements. The elements present in group 2 are Be, Mg, Ca, Sr, Ba.

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उत्तर २

Element belonging to alkaline earth family (group 2) e.g., magnesium

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

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एनसीईआरटी Chemistry Part 1 and 2 [English] Class 11
पाठ 3 Classification of Elements and Periodicity in Properties
EXERCISES | Q 3.27 - (b) | 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 gain two electrons.


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 - 2) f7 (n - 1)d1 ns2 for n = 6


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.

La belongs to group 3 while Hg belongs to group 12 and both belong to period 6 of the periodic table. Write down the general outer electronic configuration of the ten elements from La to Hg together using the orbital notation method.


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?


Consider the oxides Li2O, CO2, B2O3.

Give the formula of an amphoteric oxide.


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?


How does the metallic and non-metallic character vary on moving from left to right in a period?


Justify the given statement with suitable examples— “the Properties of the elements are a periodic function of their atomic numbers”.


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


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