Are network covalent bonds STRONGER than ionic bonds?

Md Ariful Islam

0 like 0 dislike
1 views
Share with your friends

1 Answers

Md Ariful Islam

Call

Both network covalent solids, and ionic solids ARE non-molecular, and are therefore expected to have elevated melting points with respect to molecular species.

Let's compare the melting points of $NaCl$ to $SiO_2$:

$"Melting point, NaCl"=801$ $""^@C$

$"Melting point, silicon dioxide"=2950$ $""^@C$ (And, of course, quartz is network covalent).

And we could throw in another example:

$"Melting point,"$ $Na_2O=1132$ $""^@C$

And another:

$"Melting point,"$ $CaF_2=1418$ $""^@C$

This series at least demonstrates, that as the charge of the cation increases, the INTRAMOLECULAR ionic force becomes greater in magnitude, and this is manifested by the increased melting point.

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
Are covalent crystals equivalent to a network covalent solid?

The distinction between molecular and non-molecular substances pervades much of introductory chemistry, and the distinction helps us to understand material properties. Network covalent solids such as diamond, or silicon dioxide,...

1 Answers 1 views
Compare the mineral halite (NaCl, hardness of 2.5) to diamond which is pure carbon chemically bonded to itself in a network. Are the mineral's chemical bonds covalent, polar covalent, or ionic? Which mineral is harder?

On Mohs scale, isn't diamond assigned a $10$ on the basis of hardness? Halite is almost a purely ionic material.

1 Answers 1 views
Why are ionic bonds stronger than covalent bonds?

Ionic bonds are stronger than covalent bonds due to following reasons - Ionic bonds result from the mutual attraction between oppositely charged ions while a Covalent Bond is a...

1 Answers 1 views
Can I predict if a compound has ionic bonds or covalent bonds? If so, how?

Bonds formed between non-metals are generally covalent bonds. Ionic bonds can ONLY be formed with a cation and an anion. Generally, these ions come from a metal (cation) and...

1 Answers 1 views
Why are ionic bonds and covalent bonds different?

Well, the one is a non-directional bond that derives from the interaction of like and unlike charged particles. And t'other is a strongly directional bond that results from the sharing...

1 Answers 1 views
Why is ionic bonding stronger than covalent?

The strength of a single covalent bond requires more energy to break than a single ionic bond. However ionic bonds form crystal networks where a positive ion can be held...

1 Answers 1 views
Consider the following element combinations. Classify the bonds formed between each pair as ionic, polar covalent, or nonpolar covalent qualitatively based solely on each element's position on the periodic table? Do not conduct calculations.

Something worth knowing about deciding between nonpolar and polar is that only two of the same element can form an ideally nonpolar bond. With this in mind, the $"Br"-"Br"$...

1 Answers 1 views
The electronegativity is 2.1 for H and 1.8 for Si. Based on these electronegativities, $SiH_4$ would be expected ?A) be ionic and contain H+ ions (B) be ionic and contain H- ions (C) have polar covalent bonds with a partial negative charges on the H atoms

The answer is (C) have polar covalent bonds with a partial negative charge on the hydrogen atoms. If you only go by the options given, the answer will be obvious...

1 Answers 1 views
How are these ordered from strongest to weakest: hydrogen bonds,covalent bonds, ionic bonds, and van der waals interactions?

This is the conventional order. Ionic bonds are of course non-molecular interactions.

1 Answers 1 views
Which are stronger bonds, ionic bonds or intermolecular forces? Which have higher melting points, ionic compounds or molecular compounds?

Ionic compounds are inherently non-molecular. Each cation is electrostatically ATTRACTED to EVERY other anion in the crystal. Of course, each cation is electrostatically REPELLED by EVERY other cation in the...

1 Answers 1 views
X