What is an Electrovalent Bond?

S4-SA2-0580

Grade Level:

Class 6

Space Technology, EVs, Climate Change, Biotechnology, HealthTech, Robotics, Chemistry, Physics

Definition

What is it?

An electrovalent bond, also called an ionic bond, is a type of chemical bond formed when one atom completely transfers one or more electrons to another atom. This transfer creates charged particles called ions, which are then attracted to each other, holding them together.

Simple Example

Quick Example

Imagine you have a friend who has extra laddoos (sweets) and you have none. Your friend gives you one laddoo completely. Now, your friend has fewer laddoos (becomes positively charged like an ion) and you have more (become negatively charged). This 'giving and taking' of laddoos, and the friendship that holds you together, is similar to an electrovalent bond.

Worked Example

Step-by-Step

Let's see how Sodium Chloride (common salt) forms an electrovalent bond:---Step 1: Sodium (Na) atom has 1 electron in its outermost shell. Chlorine (Cl) atom has 7 electrons in its outermost shell.---Step 2: To become stable, Sodium wants to lose 1 electron, and Chlorine wants to gain 1 electron.---Step 3: Sodium atom transfers its single outermost electron completely to the Chlorine atom.---Step 4: After losing an electron, Sodium becomes a positively charged ion (Na+).---Step 5: After gaining an electron, Chlorine becomes a negatively charged ion (Cl-).---Step 6: The strong electrical attraction between the positive Na+ ion and the negative Cl- ion forms the electrovalent bond.---Answer: Sodium Chloride (NaCl) is formed by an electrovalent bond.

Why It Matters

Understanding electrovalent bonds helps us know why common salt dissolves in water or how batteries in our electric vehicles (EVs) work. Scientists and engineers use this knowledge in fields like HealthTech to design new medicines or in Space Technology to create durable materials for rockets.

Common Mistakes

MISTAKE: Thinking electrons are shared in an electrovalent bond. | CORRECTION: In an electrovalent bond, electrons are completely TRANSFERRED from one atom to another, not shared.

MISTAKE: Believing only one electron can be transferred. | CORRECTION: One, two, or even three electrons can be transferred to form an electrovalent bond, depending on the atoms involved.

MISTAKE: Confusing ions with neutral atoms. | CORRECTION: Ions are charged particles (positive or negative) formed after an atom gains or loses electrons, while neutral atoms have no overall charge.

Practice Questions

Try It Yourself

QUESTION: What happens to an atom that loses an electron in an electrovalent bond? | ANSWER: It becomes a positively charged ion (cation).

QUESTION: Why do atoms form electrovalent bonds? | ANSWER: Atoms form electrovalent bonds to achieve a stable electron configuration, usually by having 8 electrons in their outermost shell (octet rule).

QUESTION: If an atom 'X' has 2 electrons in its outermost shell and atom 'Y' needs 2 electrons to complete its outermost shell, how many electrons will X transfer to Y to form an electrovalent bond? What type of ions will X and Y become? | ANSWER: X will transfer 2 electrons to Y. X will become a +2 charged ion (X2+) and Y will become a -2 charged ion (Y2-).

MCQ

Quick Quiz

Which of the following involves the complete transfer of electrons?

Covalent bond

Metallic bond

Hydrogen bond

Electrovalent bond

The Correct Answer Is:

An electrovalent bond (or ionic bond) is defined by the complete transfer of electrons from one atom to another, leading to the formation of ions. Covalent bonds involve sharing electrons.

Real World Connection

In the Real World

The common salt (sodium chloride) we use in our kitchens every day is a perfect example of an electrovalent compound. The strong electrovalent bonds make it a stable solid at room temperature and allow it to dissolve in water, which is crucial for cooking and our body's functions.

Key Vocabulary

Key Terms

ION: A charged atom or molecule formed by gaining or losing electrons | CATION: A positively charged ion | ANION: A negatively charged ion | ELECTRON TRANSFER: The complete movement of an electron from one atom to another | OCTET RULE: The tendency of atoms to prefer to have eight electrons in their outermost shell.

What's Next

What to Learn Next

Great job understanding electrovalent bonds! Next, you should explore 'What is a Covalent Bond?' This will help you compare and contrast how atoms can also share electrons to form different kinds of chemical bonds, which is equally important in understanding the world around us.