Name: Electronic Configuration of Elements
Uploaded: 2019-07-19
Duration: 6 min 6 s
Description: The number of protons in an atom is called its atomic number, represented by ‘Z’, while the sum of its protons and neutrons is called its mass number, given...

Question

Electronegativity values of some elements are given. Using these values, find whether the following compounds are ionic or covalent.

(Electronegativity of $Ca = 1, O = 3.5, C = 2.5, S = 2.58, H = 2.2, F = 3.98$ )

Sulphur dioxide $({SO}_{2})$

Water $(H_{2} O)$

Calcium fluoride $({CaF}_{2})$

Carbon dioxide $({CO}_{2})$

Accepted Answer

Electronegativity is the tendency of an atom to attract the shared pair of electrons towards itself. The nature of a compound can be found using the electronegativity difference. That is, generally, if the difference in the electronegativity values of the elements in a compound is $1.7$ or more, the compound will show ionic character. Similarly, if it is less than $1.7$ , the compound will show covalent character. Therefore, the nature of the given compounds can be given as,

Compound Electronegativity difference of the elements Nature of the compound

Sulphur dioxide $({SO}_{2})$ $3.5 - 2.58 = 0.92$ Covalent

Water $(H_{2} O)$ $3.5 - 2.2 = 1.3$ Covalent

Calcium fluoride $({CaF}_{2})$ $3.98 - 1.0 = 2.98$ Ionic

Carbon dioxide $({CO}_{2})$ $3.5 - 2 . 5 = 1.0$ Covalent

Elements	Valency
$Ba Cl$	$2 1$

Elements	Valency
$Zn O$	$2 2$

Important Questions on Chemical Bonding

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Electronegativity values of some elements are given. Using these values, find whether the following compounds are ionic or covalent. (Electronegativity of Ca=1, O=3.5, C=2.5, S=2.58, H=2.2, F=3.98) Sulphur dioxide SO2 Water H2O Calcium fluoride CaF2 Carbon dioxide CO2

Important Questions on Chemical Bonding

Learn and Prepare for any exam you want !