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Well, when you have ions in water (or some other polar solvent) they'll organize themselves around them ('coordinate' to the ions). If if it's a positively charged ion, then the 'negative end' of the water molecules (the oxygen atom) will point towards the ion, and if it's a negatively charged ion...

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Dec 04, 2008 · 2) Covalent compounds are soft and squishy (compared to ionic compounds, anyway). The reason for this is similar to the reason that covalent compounds have low melting and boiling points. When you hit an ionic compound with something, it feels very hard. The reason for this is that all of the ionic bonds which hold together the crystal tend to ...

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Ionic compounds are usually hard, brittle, water or alcohol soluble, have high melting points and can conduct electricity. Covalent compounds can be soft, hard or flexible, are usually less water-soluble (or alcohol soluble), have lower melting points and cannot conduct electricity when dissolved in water.

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Structure of Ionic Compounds: There are four structures that account for a large number of the 1:1 ionic solids. These are NaCl, CsCl, zinc blende, and wurtzite. The mineral zinc blende and wurtiz1te both consist of ZnS, but they have different structures.

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Nov 30, 2020 · Method to deduce the formulae of ionic compounds: Metals from Groups 1, 2 and 13 combine with non-metals from Groups 15, 16 and 17 to form ionic compounds . Table shows how the metal atoms of Groups 1, 2 and 13 form positive ions with different charges.

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Positive ions (cations) and negative ions (anions) can combine to form an ionic compound that is once again electrically neutral. These ionic compounds are named according to strict rules, so once you learn them, it's always possible to write the compound's chemical formula.

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Ionic substances form crystal lattices which allow the compounds to be hard because of the strong attractions between positive and negative ions in the lattice. When pressure is applied to the compound like chalk , it may force ions of the same charge together ( i.e. positive to positive).

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Ionic compounds are also known as electrovalent compounds. The chemical bond formed by the transfer of electrons from one atom to another is known as Ionic bond.

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Whoops, I gave you the reasons towards "largest separation" by mistake! My bad! Do the reverse reasoning, to get KF. The F- ion is incredibly small vs. Br- (136 vs. 185 pm), more than enough to compensate for Sr vs. K (133 vs. 113 pm). By the way, J.R.S.: ions act as hard spheres (mostly), so what is that "attraction of the ion" stuff?

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Ionic compounds tend to have high melting points (above 300oC). Ionic compounds are poor conductors in the solid state, but they can conduct heat or electricity when they are melted. Ionic compounds are brittle, so they shatter when struck by a hammer. The properties of ionic compounds can be explained by the strong attractions among ions within a crystal lattice.

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14. Explain why metals conduct electricity. 15. Explain why metals are easily shaped. Explain why alloys are harder than pure metals. Describe the structure and bonding in ionic substances e.g. sodium chloride. Explain why ionic substances cannot conduct electricity when solid. Describe the structure and bonding in diamond.
This is a fully-resourced lesson that looks at how the transfer of electrons from metals to non-metals causes ionic bonds and compounds to form and then Students are guided through drawing dot and cross diagrams to represent these compounds and as a result links are made to the topics of naming...
b) Explain why ammonia has a low melting point. . c) Explain why ammonia does not conduct electricity in any state. a) Explain why diamond is hard but graphite is soft b) Explain why graphite conducts electricity but diamond does not.. Complete the table to draw any missing stick or dot-cross diagrams for the mo ecules shown below. Substance ...
The energy released by the attraction between ions of unlike charge more than makes up for the endothermic nature of ionization energies, making the formation of ionic compounds an exothermic process. The strong attractions also cause most ionic materials to be hard and brittle with high melting points—for example, NaCl melts at 801 °C.
Ionic compounds have a high melting and boiling point, whereas covalent compounds have a comparatively lower melting and boiling point. The reason for this fact, is that ionic compounds require a huge amount of energy to break their ionic bonds, and pull apart the positive and negative charges.

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Jul 16, 2014 · The melting point of Al2S3 is very high (1100 C) which is a strong indicator that it is an ionic compound as well as the fact that is forms crystal lattices which are uncommon in covalently bonded molecules. It could very well be a covalently bonded molecule but just based off the information I've found it looks ionic.
Apr 07, 2020 · In ionic compounds, electrons are tightly held by the ions, and the ions cannot move translationally relative to each other. This explains many properties of ionic solids. They are hard and brittle, they are not malleable or ductile (i.e. cannot be shaped without cracking/breaking), and they do not conduct electricity. As single ions of a metal are not associated in the solid with single ions of a non metal, separate units of ionic compounds do not exist. It is, therefore, wrong to talk of a molecule of an ionic compound. I know ionic solids exist in form of crystal lattice but why can't we isolate a single molecule of ionic compound?