why covalent compounds exist as gases liquids or soft solids
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Answered by
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The atoms can be of the same element or different elements. In each molecule, thebondsbetween the atoms are strong but thebondsbetween molecules are usually weak. ...Compounds with covalent bonds may besolid, liquid or gas at room temperature depending on the number of atoms in thecompound.
PROPERTIES:
Covalent compounds usually have low melting points except in case of molecules like diamonds and silica latticeThe boiling points of these covalent molecules is low as the force of attraction between the bonded atoms are held together by van der Waal forcesCovalent bonded compounds are usually gases and liquids with low boiling and melting pointsCovalent compounds which are solids are either have soft structures like graphite as there is a cloud of electrons in between each layer of carbonsThe covalent compounds are non-conductors of electrical charge as there are no charged ions in covalent molecules except in case of graphite where we get to see cloud of electrons which help in the conductionCovalent compounds are bad conductors of heat energy as well, as these molecules lack free electrons which eventually provides infinite resistance to flow of heat energy.Conduction of heat does not bring in any changes in metals as they have free electrons to carry these energy but in case of covalent compounds these result in complete combustion as the molecules do not allow free passage of either electrical charge and heat energy and hence bring in the chemical changeCovalent compounds do not possess polar characteristics as a general property and hence are not soluble in water. Water molecules are not absolutely neutral and have a slight negative charge on the oxygen atom and slight positive charges on the hydrogen atoms and since covalent compounds are made up of neutral molecules or molecules with slight charges and hence are not attracted to water molecules strongly.
PROPERTIES:
Covalent compounds usually have low melting points except in case of molecules like diamonds and silica latticeThe boiling points of these covalent molecules is low as the force of attraction between the bonded atoms are held together by van der Waal forcesCovalent bonded compounds are usually gases and liquids with low boiling and melting pointsCovalent compounds which are solids are either have soft structures like graphite as there is a cloud of electrons in between each layer of carbonsThe covalent compounds are non-conductors of electrical charge as there are no charged ions in covalent molecules except in case of graphite where we get to see cloud of electrons which help in the conductionCovalent compounds are bad conductors of heat energy as well, as these molecules lack free electrons which eventually provides infinite resistance to flow of heat energy.Conduction of heat does not bring in any changes in metals as they have free electrons to carry these energy but in case of covalent compounds these result in complete combustion as the molecules do not allow free passage of either electrical charge and heat energy and hence bring in the chemical changeCovalent compounds do not possess polar characteristics as a general property and hence are not soluble in water. Water molecules are not absolutely neutral and have a slight negative charge on the oxygen atom and slight positive charges on the hydrogen atoms and since covalent compounds are made up of neutral molecules or molecules with slight charges and hence are not attracted to water molecules strongly.
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Answered by
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The covalent compound exist as gas liquid or soft solid because the particle/ atoms are held by weak vanderwaal forces, that is there intermolecular force is weak.
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