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Why is it correct to say ionic compounds do not have molecules?
Wiki User
∙ 12y ago
Each atom in a proper molecule has a bond to at least one other atom in the same molecule that is stronger than the bond that atom has to any other atom that is not part of the molecule. This is not true for the ions in an ionic compound, because ionic bonding is a spatial property that extends throughout a crystal of an ionic compound, so that there is at least one direction through space along which the bond strength between successive pairs of ions in one direction is just the same as in the other direction along the line throughout all the extent of the crystal (except for parts of the crystal within a few atoms of the surface of the crystal). As a result, there is nothing in an ionically bonded crystal corresponding to the boundaries of molecules in an equally sized solid of a covalently bonded compound.
Wiki User
∙ 12y ago
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Can crystals have what bonds between their atoms?
Ionic bonds in compounds such as NaCl and covalent bonds in say diamond (C) and quartz (SiO2)
What is it not practical to make tools out of ionic compounds?
Im not sure but id have a go and say that because ionic compounds are giant lattices bonded by opposite electrostatic charges due to cations and anions, if enough force is given to slightly re align this lattice (say hitting with a hammer) it will shatter due to the rearrangement of ions as the layers slide slightly creating same charges close to each other which repel and shatter the compound. That's why ionic compounds are often hard but shatter .
What is the relationship between the chemical bond type and melting point of a compound?
i would say Ionic compounds tend to have higher melting points
Why do simple molecular structures have low melting points?
Because although the covalent bonds between the elements are strong, there are only weak forces between the molecules so they have low melting points
Which compounds would produce an acidic solution when dissolved in water?
All ionic compounds Maybe, maybe not. who's to say its wrong
Why are ionic substances not made up of molecules?
Because molecule was originally defined as a cluster of two or more atoms held together by a covalent bond. So it's not accurate if we say it molecules of ionic compounds. The true sentence is polyatomic ions.
Are All organic compounds are covalently bonded?
Most of them are, though there are a few that are ionic such as sodium acetate and other organic acid salts. These include ionic bonds, but also contain covalent bonds within a polyatomic ion.
Can crystals have what bonds between their atoms?
Ionic bonds in compounds such as NaCl and covalent bonds in say diamond (C) and quartz (SiO2)
What is it not practical to make tools out of ionic compounds?
Im not sure but id have a go and say that because ionic compounds are giant lattices bonded by opposite electrostatic charges due to cations and anions, if enough force is given to slightly re align this lattice (say hitting with a hammer) it will shatter due to the rearrangement of ions as the layers slide slightly creating same charges close to each other which repel and shatter the compound. That's why ionic compounds are often hard but shatter .
How are ionic compounds formed?
All compounds are either positive or negative. Alkaline compounds are negative and acid compounds are positive. Look in the periodic table to find the compounds' chemical formula you are looking for. You want to form ionic compounds; so say you wanted to work out the formula for zinc nitrate. Zinc is Zn2+ and nitrate is NO3-. You use the Zn and take the 2 out. You don't with the nitrate because there is nothing to swap; the 3 is already converted so you don't swap that. You can't literally add the 2 from the zinc onto the 3 so you have to use brackets. Zn goes at the front of the formula because it isn't in brackets. So... Zn(NO3)2. The 2 goes outside the brackets because it cant be literally added on. Hope this helps but its not very clear, From MILLY
What is the relationship between the chemical bond type and melting point of a compound?
i would say Ionic compounds tend to have higher melting points
Are compounds larger than elements?
Depends. Molecules are bigger than atoms, because they are made of atoms, a molecule can also be a compound, but compounds are more or less made of more molecules, so yes, they are bigger, you should specify the meaning of the word compound. some molecules are bigger then small componds, and anything really can be a compound
Why do simple molecular structures have low melting points?
Because although the covalent bonds between the elements are strong, there are only weak forces between the molecules so they have low melting points
Which compounds would produce an acidic solution when dissolved in water?
All ionic compounds Maybe, maybe not. who's to say its wrong
What is a hydrated ionic solid?
A hydratd ionic solid is one that contains water. THis used to be called water of crystallisaion. Tthe formulae of such ionic solids is written as say CoCl2.(H2O)6. Sometimes the water molecules are grouped around the cation and are said to be coordiated to it. Sometimes water molecule(s) are not bound to the cation. An example of a salt with both sorts is CoCl2.(H2O)6. In this 4 water molecules and two chloride ions surround the Co2+ ion and two water molecules are not coordinated.
What is polar and non polar compound?
polar compounds are those which have charged ends or you can say those compound or molecules which have +ve ends and -ve ends in their structure . non polar are those which don't have any charged ends thee molecules are neutral in their configuration . polar molecules have strong force of attraction than non poalr molecules between them due to which thaey have high melting point and strength
What holds atoms together in molecules?
Chemical bonds. For example, with ionic bonds it is the attraction of opposite charges. With covalent bonds it is the sharing of electrons.
