12/10/14 chemistry
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| what is a chemical bond | an attractive force between atoms or ions that binds them together as a unit (ionic compound, molecule, metal)
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| why do chemical bonds form | bc 1.potential energy is lowered 2.stability of the system increases
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| what is ionic bonding | a bond between positively charged ions (cations) and negatively charged ions (anions)
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| what is usually formed in ionic bonding | a solid
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| what is ionization | atoms gain or lose valence electron(s) and become charged (an ion)
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| what is oxidation | an atom loses electron(s). a cation is formed
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| what is reduction | an atoms gains electron(s). an anion is formed
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| what are the two types of ionization | oxidation and reduction
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| metals are easily ______, forming positive ions | oxidized
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| non-metals are easily _____, forming negative ions | reduced
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| what is an oxidation number | a + or - number assigned to an atom according to an arbitrary set of rules.
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| crystalline solids are normally ____ bonding | ionic
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| what type of bonding is formed between a metal and a nonmetal ion due to very different electronegativities | ionic
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| what is covalent bonding | sharing of one or more electron pairs between two atoms, bonds are never purely ionic
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| HOFBRINCLS are examples of .....? | covalent bonding
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| what is metallic bonding | seen between metal atoms
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| what does metallic bonding result from | the attraction between positively charged metal ions and the surrounding mobile electrons
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| what is the location of the electrons in metallic bonding | they're delocalized, free to move around and not belong to only one ion
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| what is the electron sea | one plane of ions in a metal can slide past another without breaking bonds because of the electron sea (enabling ductility, malleability, and electron conductivity)
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| what happens to ionic crystals when they try to bend | they shatter !
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| what does the melting point, boiling point, and hardness of a compound depend on? | how strongly its representative particles are attracted to each other
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| how are ionic bonds formed | electrons are transferred from metal to nonmetal
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| how are covalent bonds formed | electrons are shared between two nonmetals
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| how are metallic bonds formed | electrons are deloclaized among metal atoms
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| type of structure of ionic bonds | crystal lattice
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| type of structure of covalent bonds | true molecules
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| type of structure of metallic bonds | "electron sea"
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| physical state of ionic bonds | solid
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| physical state of covalent bonds | solid, liquid, or gas
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| physical state of metallic bonds | solid (except Hg)
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| melting point of ionic bonds | very high
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| melting point of covalent bonds | mostly low
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| melting point of metallic bonds | high
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| are ionic bonds soluble in water | yes (many)
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| are covalent bonds soluble in water | depends on polarity
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| are metallic bonds soluble in water | no
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| which bonds are odorous | covalent
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| properties of metallic bonds | metallic, ductile, lustrous
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