i. Write the electron dot structures for sodium, oxygen, and magnesium.
ii. Show the formation of MgO and Na2O by the transfer of electrons.
iii. What are the ions present in these compounds?

AcademicChemistryNCERTClass 10

"NCERT

ii. Formation of Magnesium oxide

When magnesium reacts with oxygen, the magnesium atom transfers its two outermost electrons to an oxygen atom. By losing 2 electrons, the magnesium atoms form a magnesium ion (Mg2+) and by gaining 2 electrons, the oxygen atom forms an oxide ion (O2-).

"NCERT

Formation of Sodium oxide

Two sodium atoms transfer their 2 outermost electrons to an oxygen atom. By losing two electrons, the two sodium atoms form two sodium ions (2Na+). And by gaining two electrons, the oxygen atom forms an oxide ion (O2-.)

"NCERT

iii. The ions present in the sodium oxide compound (Na20) are sodium ions (2Na+ and oxide ions (O2-).

The ions present in the Magnesium oxide compound (MgO) are magnesium ions Mg2+ and oxide ions (O2-).

raja
Updated on 10-Oct-2022 12:46:59

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