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Why are ionic compounds usually have high melting point while most simple covalent compounds have low melting point?
Wiki User
∙ 9y ago
Ionic compounds are mad by ionic bonding The two parts of the compound ther for become one by means of moving electronioc and beoming stable there fore the bond and the compound is stronger that conalent compounds which just share the electrons needed for the two (or more ) elements to become a compound so they are weaker
Wiki User
∙ 16y ago
Wiki User
∙ 9y agoIonic compounds have strong bond made of attraction between cation and anion.It is needed to break that bond to vapourize them.On the other hand,covalent compound is not needed to break the internal covalent bond.Rather they need to break the weak van dar wals force only.So less energy is needed for covalent than ionic compounds.
Wiki User
∙ 11y agoIonic compounds
have higher boiling points than molecular compounds because the bonds that hold them together are stronger and so need more energy to break them.
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How do you differentiate simple molecular compounds and giant molecular compounds?
simple molecular compounds have weak forces of atraction.
Do salts form covalent bonds?
Yes, salts do form covalent bonds. Actually, no bond is 100% ionic or covalent. For example, if you consider NaCl, even though it is considered ionic, it has some amount of covalent character in its bond.
What are some properties of molecular bonding?
Simple molecular structures have very strong covalent bonds, but the intermolecular forces are very weak. This means they can be parted easily, which means they are not very hard or strong and can have thus a very low melting point. This means that at room temperature, they are usually gases or liquids.Since they have no ions either, they cannot conduct electricity very well. Simple molecular solids such as ice, tends to melt easily and dissolve in organic solvents.
What is the differece between a substance with a giant covalent structure and a simple covalent structure?
The giant structure involve an enormous number of atoms.
What are molecular addition compounds?
the compounds which contain two or more simple compounds that can be packed in a definite ratio into a crystal. A dot is used to separate the compounds in the formula.Like ZnSO4.H2O
Do non polar covalent compounds have high or low melting points?
No they have high melting and boiling points. Don't get confused with simple molecular structures such as water and carbon dioxide which have simple covalent structures. When you heat them you are overcoming the forces BETWEEN THE MOLECULES (intermolecular/van der waals forces of attraction), NOT the actual covalent bonds themselves, like the bond betwen the C and either O in carbon dioxide.
What can you tell about methane (CH4) from its molecular formula?
It is a saturated hydrocarbon. It is a covalent compound and has all properties which are identical to simple covalent compounds. Low boiling and melting points, soluble in organic solvents (most simple covalent compounds are soluble in organic solvent), insoluble in water and does not conduct electricity as in does not have free ions.Its tetrahedral geometry makes it non-polar.It contains four hydrogen atoms
What does the formula for propane tell you about a molecule of propane?
It is a saturated hydrocarbon. It is a covalent compound and has all properties which are identical to simple covalent compounds. Low boiling and melting points, soluble in organic solvents (most simple covalent compounds are soluble in organic solvent), insoluble in water and does not conduct electricity as in does not have free ions.Its tetrahedral geometry makes it non-polar.It contains four hydrogen atoms
Are silicon compounds ionic or covalent?
They are covalent. Some are simple molecules, others are giant covalent structures.
Why do covalent compounds have lower melting points than the ionic compounds?
Covalent compounds are formed by the sharing of electrons, hence the bonding is relatively weak. On the other hand, ionic compounds are formed by the transferring of electrons thus strong electrostatic forces holds the compound together, the strength in these forces co-existing within the ionic compounds require a large amount of energy to break it apart hence boiling and melting points are high.
Do substances that usually contain covalent bonds have a giant or simple molecular structure?
Such compounds can have either a giant or a simple molecular structure. Cellulose is an example of a material with a giant structure, and carbon monoxide has a very simple one.
What are properties of a covalent bond?
Simple covalent molecules tend to have low boiling and melting points, as well as being quite brittle when solid.
Is plastic a ionic compound or molecular compound?
No. Plastic is a mixture of covalent compounds.
Is covalent bond the strongest bond?
yes and no. Simple discrete molecules have simple covalent bond and its melting point is very low because little energy is needed to overcome its simple covalent bonds. But it can be very strong when there are plenty of bonds like in diamond- which has a giant covalent lattice. (there are alot of these covalent bonds holding it together) so alot of energy is needed to break the bonds.
What is the example of binary covalent compounds?
A binary covalent compound is one that contains two substances joined by covalent bonds. For example, two nonmetals often join together to form covalent compounds. So, P2O5 (phosphorus pentoxide) is a binary covalent compound. H2O (dihydrogen monoxide) is another one. This is in contrast to binary ionic compounds, which are salts, and are formed by a metal combining with a nonmetal with ionic bonds.
What are the properties of covalent compounds?
*soft-tend to be gases, liquids, or gases *poor conductors of heat & electricity *brittle or cleave rather than deform *nonelectrolytes-do not conduct electricity in water
What are some properties of molecular compounds?
Simple molecular structures like H2O and CO2 have the following properties: 1) Physical state: usually liquids and gases at room temperature due to weak intermolecular forces 2) Melting and boiling points: low (below 2000 C) melting and boiling points due to weak intermolecular forces 3) Electrical conductivity: cannot conduct electricity because there are no free electrons 4) Solubility: insoluble in water, but soluble in organic substances such as petrol Macromolecular structures such as diamond and SiO2 have the following properties: 1) Physical state: hard solids at room temperature due to the many strong covalent bonds holding the atoms together 2) Melting and boiling points: high melting and boiling points due to the many strong covalent bonds that must be broken before the substance can change state 3) Electrical conductivity: cannot conduct electricity because there are no free electrons 4) Solubility: insoluble
