alkalipost - ALKALI METALS ALKALI METALS Basic Structural...

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Unformatted text preview: ALKALI METALS ALKALI METALS Basic Structural Aspects Examining the Main Group [noble gas] ns 1 [He]2s 1 [Ne]3s 1 basic structural aspects ALKALI METALS ALKALI METALS What species they will form? Examining the Main Group We saw earlier H shares periodic properties with the alkali metals : An important consideration whenever you are examing new chemistry.is it similar to anything Ive done/seen before? - IE EA IE 1 EA 1 (kJ mol-1 ) + EA means H EA is -- like H alkali metals want to gain tability for their unpaired e- oelectronic with nearest via : transfer of an e- Ionic species 520.2 60 Li 95 8 53 Na stability for their unpaired e 1312 73 H M- M + isoelectronic with nearest noble gas filled ns 2 subshell 495.8 53 Na 418.8 48 K 403.0 47 Rb M and via : sharing of an e- Covalent species 375.7 46 Cs Unlike H less likely to gain tability by receiving an etallic MM and M n applying the basic structural aspects stability by receiving an electronThis makes M n or M- species of chemical interest! metallic ALKALI METALS ALKALI METALS Occurrence in Nature M + Salts Examining the Main Group- Commonly found in minerals and natural waters- Some ions play very important role in biofluids (Na + , K + ) Co-localisation of staining for neurofilament (green) and the a3 subunit of e Na+/K+ TPase ed) the Na+/K+ ATPase (red) in dorsal root ganglia neurons. arnallite KCl.MgCl H Carnallite KCl.MgCl 2 .6H 2 O NaCl Silicates Useful starting materials due to high abundance BUT not in terms of stablity! What really happens? Can you explain it? ALKALI METALS ALKALI METALS Examining the Main Group Elemental or MOST PURE Form M(s) Why not diatomic like H? Too large for such localized bonding! r mp bp E o E diss o C o C V kJ mol-1 1.52 180.5 1326 -3.02 108.0 1.86 97.8 883 -2.71 73.3 2.27 63.7 756 -2.92 49.9 2.48 38.98 688 -2.99 47.3 2.65 28.59 690 -3.02 43.6 Useful starting materials due to igh PURITY and REACTIVITY, Group 1 or IA metals show most clearly and with least complication the ffect of increasing size and mass on...
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alkalipost - ALKALI METALS ALKALI METALS Basic Structural...

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