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Octet Rule

Explain the o...

Question

Explain the octet rule for the formation of a molecule of sodium chloride from sodium and chlorine atoms.

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Solution

Octet rule is every element react to complete its octet .

Na . has atomic no. = 11

electronic configuration = 2,8 , 1

to complete its octet Na want to donate it's

1 valence electron .

Cl has atomic no.= 17

electronic configuration = 2, 8, 7.

to complete its octet Cl has to gain 1 electron

when Na and Cl react sodium donate its 1 electron and chlorine take it

this way octet of both elements is complete

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(a) octet rule for formation of sodium chloride

(b) duplet rule for formation of hydrogen.

Q. (a) Give the electronic configurations of sodium and chlorine.
(b) Write the electron-dot structures for sodium and chlorine atoms.
(c) Describe the formation of sodium chloride from sodium and chlorine by the transfer of electrons. What changes take place in the electronic configurations of sodium and chlorine during the formation of sodium chloride?
(d) Write any two properties of ionic compounds.

Explain by drawing a figure of the electronic configuration.

a. Formation of sodium chloride from sodium and chlorine.

b. Formation of a magnesium chloride from magnesium and chlorine.

Q. Assertion :Octet rule is obeyed in the formation of sodium chloride. Reason: According to octet rule, the sodium atom which has only single electron in outermost shell , looses the electron to get a stable configuration like Ne gas, while the chlorine gas with 7 valence electrons gains an electron from the Na atom to obtain an stable configuration like Ar gas.

Q. An atom of sodium loses one electron and chlorine atom accepts one electron. This result in the formation of sodium chloride molecule. The type of bond formed is known as _________.

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