The electronegativity of caesium is 0.7 and that of fluorine is 4.0. The bond formed between the two isa)covalent b)electrovalentc)coordinate :d)metallicCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

There is a large difference between electronegati ity of both element... So the bond formed will be electrovalent or ionic....

Answer

If difference in a electronegativity is more than 1.7 then that bond is ionic
similarly if electronegativity differences is between 0.2 and 1.7 it form polar covalent bond
polar covalent bond means unequal number of electrons are shared between same bond for example H20 IN which more electrons are towards oxygen due to electronegativity

Answer

Such a large difference in electronegativity shows that Cs is electropositive while F is electronegative in nature. So, Cs can donate an electron to F which can accept it. So, they form ionic bond or electrovalent bond

Answer

Electronegativity and Bond Types

Electronegativity:
Electronegativity is the measure of an atom's ability to attract electron density towards itself in a chemical bond. It is a dimensionless property and is often expressed on the Pauling scale. The scale ranges from 0.7 for caesium (Cs) to 4.0 for fluorine (F).

Bond Types:
Based on the electronegativity difference between atoms, chemical bonds can be classified into three main types:

1. Covalent Bond:
- Formed between atoms with similar electronegativity values.
- Electrons are shared between atoms to achieve a stable electron configuration.
- The electronegativity difference between the bonded atoms is generally less than 0.5.

2. Electrovalent or Ionic Bond:
- Formed between atoms with significantly different electronegativity values.
- Electrons are transferred from one atom to another, resulting in the formation of positively and negatively charged ions.
- The electronegativity difference between the bonded atoms is generally greater than 1.7.

3. Coordinate Covalent Bond:
- A special type of covalent bond where one atom donates a pair of electrons to the other atom.
- The atom accepting the electron pair is called the Lewis acid, while the one donating is called the Lewis base.
- This bond is often formed between atoms with different electronegativity values.

Bond between Caesium and Fluorine:
The electronegativity difference between caesium (0.7) and fluorine (4.0) is significant (3.3). This large electronegativity difference indicates that caesium and fluorine will form an electrovalent or ionic bond.

In an electrovalent bond, caesium will donate an electron to fluorine, resulting in the formation of Cs+ and F- ions. The electrostatic attraction between these oppositely charged ions forms the ionic bond.

Therefore, the bond formed between caesium and fluorine is an electrovalent or ionic bond.

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