As we know, the electronic configuration of any atoms tells us how much that atom is stable. And also how many that atom can share their valence electron to become stable.
Here in this post, we will discuss a most asked question. That is show the formation of Na2O and MgO by the transfer of electrons.
To answer this question. Let’s get help of electron dot structure. A electron dot structure is a method to find and the type of bond and types of ions of any atoms or molecules.
Now, let’s explore the formation of Na2O and MgO by electron dot structure. But before we start the formation let’s understand how two atoms or molecules combined each other.
We all know that two or more atoms or molecules can be combined to form a compound. All these compounds can be made by electron dot structure.
This happens as follows: when two or more atoms or molecules combined with the help of electron dot structure a compound formed.
In the same way, sodium oxide (Na2O) and Magnesium oxide (MgO) can be formed with the help of electron dot structure.
Table of Contents
The formation of Na2O and MgO by transfer of electrons.
As we know that sodium atom has 11 electron, proton and neutron. And oxygen atom has 8 electron, proton and neutron.
Therefore, sodium atom has 1 extra electron. Because even it has 10 electron it can achieve the noble gas state.
On the other hand, oxygen has 2 less electron to achieve the state of noble gas.
So, if both the atom sodium and oxygen will share each other electron then both can achieve the state of stability.
Now, sodium has only one extra electron but oxygen needs 2 electron to become stable. So, if 2 sodium atoms shares one own electron then oxygen can get 2 electron.
This share of electron from one atom to another atom to make a compound known as electron dot structure. Aa shown in given fig.
Here, we will discuss the formation of Na2O and MgO by electron dot structure.
As you can see in the above fig. Sodium (Na) has one free electron to share. But oxygen needs two electron to become stable. That’s why two sodium atom gives each one electron to the oxygen and become a positive ions.
Because as we know, those atom who give electron known as positive ions and those who gain of electron known as negative ions.
That’s the reason oxygen has 2 negative ions. Similarly in magnesium oxide compound, Magnesium gives 2 electron to oxygen and become positive ions. And oxygen has two negative ions due to gain of electron.
Please note that:- whenever we make a compound by two distinct elements. We have to do it by electron dot structure.
After you have solved the problem related to electron dot structure. You will notice that the balancing of such compounds also happens.
Conclusion
The formation of sodium oxide (Na₂O) and magnesium oxide (MgO) involves the transfer of electrons, which leads to the formation of ionic bonds between the elements. Here’s how the process works for each compound:
Formation of Sodium Oxide (Na₂O):
- Sodium (Na) atom:
- Sodium (Na) is an alkali metal with one electron in its outermost shell.To achieve a stable electron configuration, sodium loses this one electron, forming a sodium ion (Na⁺).
- Oxygen (O) atom:
- Oxygen (O) has six electrons in its outermost shell and needs two more electrons to complete its octet.Oxygen gains two electrons, forming an oxide ion (O²⁻).
- Formation of Sodium Oxide (Na₂O):
- Two sodium atoms each lose one electron to form two Na⁺ ions.One oxygen atom gains two electrons to form O²⁻.The Na⁺ ions and the O²⁻ ion are held together by electrostatic attraction, forming sodium oxide (Na₂O).
Formation of Magnesium Oxide (MgO):
- Magnesium (Mg) atom:
- Magnesium (Mg) is an alkaline earth metal with two electrons in its outermost shell.To achieve a stable electron configuration, magnesium loses these two electrons, forming a magnesium ion (Mg²⁺).
- Oxygen (O) atom:
- As before, oxygen (O) needs two electrons to complete its octet and forms an oxide ion (O²⁻).
- Formation of Magnesium Oxide (MgO):
- One magnesium atom loses two electrons to form one Mg²⁺ ion.One oxygen atom gains these two electrons to form O²⁻.The Mg²⁺ and O²⁻ ions are held together by strong ionic bonds due to their opposite charges, forming magnesium oxide (MgO).
Summary of the Electron Transfer:
- Na₂O: 2 Na atoms each lose 1 electron to form 2 Na⁺ ions, and 1 O atom gains 2 electrons to form O²⁻.
- MgO: 1 Mg atom loses 2 electrons to form Mg²⁺, and 1 O atom gains 2 electrons to form O²⁻.
These electron transfers lead to the formation of ionic compounds, with Na₂O having Na⁺ ions and O²⁻ ions, and MgO having Mg²⁺ ions and O²⁻ ions.
Show the Formation of Na₂O and MgO by the Transfer of Electrons: A Simple Explanation for Students
Here is the Formation of sodium oxide by electron dot structure as well as the formation of magnesium oxide by electron dot structure.

When studying chemical bonding, one important concept is ionic bonding—a process where atoms transfer electrons to achieve stable electronic configurations. Two common examples of ionic compounds are sodium oxide (Na₂O) and magnesium oxide (MgO). In this article, we’ll show the formation of Na₂O and MgO by the transfer of electrons using clear explanations and simple examples that will help students understand the process easily.
What Is an Ionic Bond?
An ionic bond forms when electrons are transferred from one atom to another. This usually happens between:
- Metals, which lose electrons to form positively charged ions (cations).
- Non-metals, which gain electrons to form negatively charged ions (anions).
The resulting attraction between these opposite charges holds the atoms together in a stable ionic compound.
Formation of Sodium Oxide (Na₂O) by Electron Transfer
Sodium oxide (Na₂O) is formed through the transfer of electrons between sodium (Na) and oxygen (O) atoms.
Step-by-Step Process:
- Sodium Atom (Na):
- Atomic number: 11
- Electron configuration: 2, 8, 1
- To achieve stability (a full outer shell), each sodium atom loses one electron and becomes a Na⁺ ion (sodium ion).
- Oxygen Atom (O):
- Atomic number: 8
- Electron configuration: 2, 6
- To complete its outer shell, oxygen needs two electrons. It gains two electrons to become an O²⁻ ion (oxide ion).
- Ionic Bond Formation:
- Two sodium atoms each donate one electron to a single oxygen atom.
- This results in two Na⁺ ions and one O²⁻ ion combining to form Na₂O.
Chemical Equation:
2 Na + O → Na2O2 \, \text{Na} \, + \, \text{O} \, \rightarrow \, \text{Na}_2\text{O}
Key Point:
The transfer of two electrons from two sodium atoms allows the oxygen atom to achieve a full outer shell, forming a stable ionic bond.
Formation of Magnesium Oxide (MgO) by Electron Transfer
Magnesium oxide (MgO) forms in a similar way, but involves magnesium (Mg) and oxygen (O) atoms.
Step-by-Step Process:
- Magnesium Atom (Mg):
- Atomic number: 12
- Electron configuration: 2, 8, 2
- Magnesium loses two electrons to become a Mg²⁺ ion.
- Oxygen Atom (O):
- Like before, oxygen needs two electrons to complete its outer shell.
- It gains both electrons from one magnesium atom and becomes an O²⁻ ion.
- Ionic Bond Formation:
- One magnesium atom transfers two electrons directly to one oxygen atom.
- This forms a strong bond between Mg²⁺ and O²⁻ ions, resulting in the compound MgO.
Chemical Equation:
Mg + O → MgO\text{Mg} \, + \, \text{O} \, \rightarrow \, \text{MgO}
Key Point:
Magnesium donates both electrons to a single oxygen atom, forming a strong ionic bond in magnesium oxide.
Differences Between Na₂O and MgO Formation
Feature | Sodium Oxide (Na₂O) | Magnesium Oxide (MgO) |
---|---|---|
Metal Involved | Sodium (Na) | Magnesium (Mg) |
Electrons Lost | 1 electron per sodium atom | 2 electrons from one magnesium atom |
Electrons Gained | Oxygen gains 2 electrons from 2 Na atoms | Oxygen gains 2 electrons from 1 Mg atom |
Ionic Compound Formed | Na₂O | MgO |
Why Is Electron Transfer Important in Ionic Bonding?
The transfer of electrons allows atoms to:
- Achieve stability by having a full outer shell of electrons.
- Form strong ionic bonds that hold the compound together.
- Create compounds with unique properties such as high melting points, hardness, and electrical conductivity when dissolved in water.
Conclusion
To show the formation of Na₂O and MgO by the transfer of electrons, we must understand the basic principle of electron transfer:
- Sodium transfers electrons to oxygen, forming Na₂O.
- Magnesium transfers electrons to oxygen, forming MgO.
This simple process results in the formation of stable, strongly bonded ionic compounds that are essential in various chemical and industrial processes.
What is the formation of Na2O and MgO by the transfer of electrons?

The formation of Na₂O and MgO occurs through the transfer of electrons in an ionic bond:
Sodium Oxide (Na₂O): Each sodium (Na) atom loses one electron to become a Na⁺ ion. Two sodium atoms transfer their electrons to one oxygen (O) atom, which gains two electrons to form an O²⁻ ion. The resulting ions bond to form Na₂O.
Magnesium Oxide (MgO): One magnesium (Mg) atom loses two electrons to become an Mg²⁺ ion. These two electrons are gained by one oxygen atom, forming an O²⁻ ion. The ions then bond to form MgO.
In both cases, electron transfer allows the atoms to achieve stable electronic configurations, forming strong ionic bonds.
आयनिक यौगिकों के तीन गुण क्या हैं?
आयनिक यौगिकों के तीन मुख्य गुण निम्नलिखित हैं:
उच्च गलनांक और क्वथनांक:
आयनिक यौगिकों में धनायनों (cations) और ऋणायनों (anions) के बीच मजबूत वैद्युत स्थैतिक आकर्षण होता है। इन बंधनों को तोड़ने के लिए अधिक ऊर्जा की आवश्यकता होती है, जिससे इनके गलनांक (melting point) और क्वथनांक (boiling point) अधिक होते हैं।
विद्युत चालकता:
आयनिक यौगिक ठोस अवस्था में विद्युत का संचालन नहीं करते क्योंकि उनके आयन स्थिर रहते हैं। लेकिन, जब ये पानी में घुल जाते हैं या पिघल जाते हैं, तो उनके आयन स्वतंत्र रूप से घूम सकते हैं, जिससे ये विद्युत का अच्छा संचालन करते हैं।
भंगुरता (Brittleness):
आयनिक यौगिक कठोर तो होते हैं लेकिन यह भंगुर होते हैं। जब इन पर बल लगाया जाता है, तो समरूप आवेश वाले आयन एक-दूसरे के पास आ जाते हैं, जिससे विकर्षण बल (repulsive forces) उत्पन्न होते हैं और यौगिक टूट जाता है।
एमजीओ का गठन एक्ज़ोथिर्मिक या एंडोथर्मिक है?
MgO (मैग्नीशियम ऑक्साइड) का गठन एक एक्ज़ोथर्मिक (Exothermic) प्रक्रिया है।
कारण:
जब मैग्नीशियम (Mg) ऑक्सीजन (O₂) के साथ प्रतिक्रिया करता है, तो वह इलेक्ट्रॉन खोकर Mg²⁺ आयन बनाता, और ऑक्सीजन इलेक्ट्रॉन ग्रहण कर O²⁻ आयन बनाता। इन आयनों के बीच मजबूत आयनिक बंधन बनने पर एक बड़ी मात्रा में ऊर्जा मुक्त होती है।
रासायनिक समीकरण:
2
Mg
+
O
2
→
2
MgO
+
ऊर्जा
2\text{Mg} + \text{O}_2 \rightarrow 2\text{MgO} + \text{ऊर्जा} इस प्रक्रिया में इतनी अधिक ऊर्जा निकलती है कि मैग्नीशियम जलते समय तेज़ सफेद रोशनी उत्पन्न करता है। इसलिए, MgO का गठन एक्ज़ोथिर्मिक प्रक्रिया है क्योंकि इसमें ऊर्जा का उत्सर्जन होता है।
सोडियम, ऑक्सीजन और मैग्नीशियम के लिए इलेक्ट्रॉन डॉट संरचना क्या है?
सोडियम (Na), ऑक्सीजन (O), और मैग्नीशियम (Mg) की इलेक्ट्रॉन डॉट संरचना उनके संवैलेंसी इलेक्ट्रॉनों (valence electrons) पर आधारित होती है।
1. सोडियम (Na):
परमाणु संख्या: 11
इलेक्ट्रॉन विन्यास: 2, 8, 1
बाहरी कक्षा में 1 इलेक्ट्रॉन होता है।
इलेक्ट्रॉन डॉट संरचना:
Na
⋅
\text{Na} \cdot (यह एक बिंदु सोडियम के बाहरी कक्षा के एक इलेक्ट्रॉन को दर्शाता है।)
2. ऑक्सीजन (O):
परमाणु संख्या: 8
इलेक्ट्रॉन विन्यास: 2, 6
बाहरी कक्षा में 6 इलेक्ट्रॉन होते हैं।
इलेक्ट्रॉन डॉट संरचना:
⋅
⋅
O
⋅
⋅
\cdot \cdot \text{O} \cdot \cdot (ऑक्सीजन के चारों ओर 6 बिंदु इसके 6 बाहरी इलेक्ट्रॉनों को दर्शाते हैं।)
3. मैग्नीशियम (Mg):
परमाणु संख्या: 12
इलेक्ट्रॉन विन्यास: 2, 8, 2
बाहरी कक्षा में 2 इलेक्ट्रॉन होते हैं।
इलेक्ट्रॉन डॉट संरचना:
Mg
⋅
⋅
\text{Mg} \cdot \cdot (यह दो बिंदु मैग्नीशियम के बाहरी कक्षा के दो इलेक्ट्रॉनों को दिखाते हैं।)
निष्कर्ष:
सोडियम (Na) में 1 बिंदु होता है।
ऑक्सीजन (O) में 6 बिंदु होते हैं।
मैग्नीशियम (Mg) में 2 बिंदु होते हैं।
ये बिंदु उनके संवैलेंसी इलेक्ट्रॉनों का प्रतिनिधित्व करते हैं, जो रासायनिक बंधन बनाने में भाग लेते हैं।
Why do ionic compounds have high melting point class 10th?
Ionic compounds have high melting points because of the strong electrostatic forces of attraction between the oppositely charged ions (cations and anions). These forces hold the ions tightly in a fixed, regular lattice structure, and a large amount of energy is required to break these bonds, resulting in a high melting point.
FAQs
Q1: Why do sodium and magnesium form different compounds with oxygen?
Because sodium loses 1 electron per atom, it takes 2 sodium atoms to fulfill the oxygen atom’s need for 2 electrons. Magnesium loses 2 electrons from a single atom, which directly satisfies the oxygen atom’s requirement.
Q2: What type of bond is present in Na₂O and MgO?
Both compounds have ionic bonds formed through the transfer of electrons.
Q3: Where are these compounds commonly used?
- Sodium oxide (Na₂O): Used in ceramics and glass manufacturing.
- Magnesium oxide (MgO): Used as a refractory material and in medical applications.
This explanation should help students clearly understand how Na₂O and MgO form through electron transfer. If you’re preparing for exams, remembering the electron movement and ionic bond formation will help you score well in chemistry questions related to this topic!