Chapter%202-1 - and the charge for each of these metals Mg...

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Chemical bonding 2.5 – 2.9
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2.5 Periodic Table On the periodic table be able to find/define: Metals / non-metals / semi-metals Transition metals Periods / rows Groups / families / columns Halogens (7A) / noble gases (8A) Alkali (1A) / alkaline (2A) Atomic number / atomic mass
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Periodic Table
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2.6 Molecular Mass For Compounds, add atomic mass together to get molecular mass CaCl 2 Pb(OH) 2 Molecular mass is in g/mol The parenthesis means the 2 applies to both the O and the H
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2.7 Ionic Bonds Ionic Bonds – one element transfers or gives electrons to another element The element that loses the electron has a positive charge , and is called a cation The element that gains the electron has a negative charge , and is called an anion
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2.7 The Cation The cation (loses electron) is a metal Strong tendency to lose enough electrons to achieve noble gas configuration Try to predict the number of electrons lost
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Unformatted text preview: and the charge for each of these metals: Mg K Al 2.7 The Anion • The anion (gains electron) is a non-metal • Strong tendency to gain enough electrons to achieve noble gas configuration • Try to predict the number of electrons gained and the charge on these non-metals: F O Periodic Table VIIIA +1 +2 +3-3-2-1 Transition Metals 2.7 Ionic bond • Predicting the cation and anion charge is important! • Cation and anion combine to form a neutral ionic compound (charges add up to zero) • Predict how these would combine Na with O Na with N Ca with O Ca with P 2.7 Polyatomic ions • Some covalent bonded non-metals commonly occur as a group • These groups also have a charge • Called polyatomic ions • Must memorize the ones on the next slide (this is an abbreviated list from Table 2.2, page 65)...
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