Term
| How is the reactivity of elements related to valence lectrons in atoms? |
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Definition
| The number of valence lectrons in a atoms of an elemnt determins may properties of that element including the ways in which the atom can bond with other atoms. |
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Term
| What doe the periodic table tell you about the atoms of elements? |
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Definition
| The periodic table reveals the underlying atomic structure of aotms including the arrangement of the electrons |
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Term
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Definition
| Ionic bonds form as a result of the attractions between positive and negative ions. |
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Term
| How are the formulas of ionic compounds written? |
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Definition
| When ionic compounds form the ions come together in a way that balances out the charges on the ions. The chemical formula for the compound reflects |
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Term
| How are names of ionic compounds written? |
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Definition
| FOr an ionic compound the n ame of the positive comes first followed by the name of the negative ion. |
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Term
| What are the properties of ionic compounds? |
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Definition
| In general, ionic compunds are hard brittle solids with high melting points. When melted or dissolved in water they conduct an electrical current. |
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Term
| What holds covalently bonded atoms together? |
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Definition
| The force that holds atoms together in a covalent bond is the attraction of each atom's nucleus for the shared pair of electrons. |
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Term
| What are the properties of molecular compounds? |
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Definition
| Molecular compounds have lower melting points and boiling points. They do not conduct electric current when melted or dissolved in water. |
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Term
| How does unequal sharing of electrons affect molecules? |
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Definition
| Unequal sharing of electrons causes the bonded atoms to have slight electrical charges. |
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Term
| How do he properties of metals and alloys compare? |
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Definition
| Alloyss are generally stronger and less reactive than pure metals from which they are made. |
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Term
| How do metal atoms combine? |
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Definition
| Metal atoms combine in regular patterns in which the valence electrons are free to move from atom to atom. |
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Term
| How does metallic bonding result in useful properties of metals? |
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Definition
| The sea of electrons model of metallic bonding helps explain the maleability ductility luster high electrical conductivity and high thermal conductivity of metals |
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