1 00:00:09,555 --> 00:00:13,542 Chemical bonds are classified according to their strength 2 00:00:14,093 --> 00:00:17,640 there's the weak hydrogen bond, labile 3 00:00:17,722 --> 00:00:20,225 between two atoms which are very different from each other 4 00:00:20,635 --> 00:00:24,492 there's the coordinate bond, where one of the two atoms gives and the other receives 5 00:00:24,504 --> 00:00:31,888 the ionic bond, an attraction which is intense and inescapable between opposite poles, negative and positive 6 00:00:32,609 --> 00:00:39,573 And then there's the covalent bond where two atoms share their most precious attribute 7 00:00:40,055 --> 00:00:42,964 and which represents the strongest bond to be found in Nature. 8 00:01:24,025 --> 00:01:26,929 CHAIN REACTIONS 9 00:01:27,647 --> 00:01:30,225 Bonds 10 00:01:50,715 --> 00:01:53,366 - Silvia, hold on - What is it? 11 00:01:53,418 --> 00:01:56,630 Are you sure there's no-one in? It's usually always so crowded round here 12 00:01:56,646 --> 00:01:59,799 Positive. My brother owes me a favour so he's got the girls for the day 13 00:01:59,956 --> 00:02:03,581 and on Thursdays Olga teaches Cyrillic writing at the U3A. 14 00:02:03,698 --> 00:02:06,626 - Great! - Yeah! Alone at last! 15 00:02:06,635 --> 00:02:11,745 No, I meant that's really interesting. I've always wanted to learn how to write Cyrillic. 16 00:03:06,433 --> 00:03:08,594 Really gross! 17 00:03:11,502 --> 00:03:14,494 Was that a joint she had in her hand? 18 00:03:16,985 --> 00:03:19,472 I'd say that's gonna be the least of your worries right now 19 00:03:23,955 --> 00:03:26,298 And here she is, the last but not least of my worries 20 00:03:28,483 --> 00:03:30,629 Hi Mum, how are you? 21 00:03:30,798 --> 00:03:34,360 Forget how I am, have you called Alessia to apologise? 22 00:03:34,692 --> 00:03:38,183 Err... well, not really... I tried, but... 23 00:03:38,419 --> 00:03:40,795 For heaven's sake, Silvia, you're always the same 24 00:03:40,997 --> 00:03:44,197 If you don't call her by tonight I'm leaving you out of my will 25 00:03:44,205 --> 00:03:45,076 Oh, Mum! 26 00:03:45,152 --> 00:03:49,772 Don't oh Mum me. Call her NOW! 27 00:03:57,747 --> 00:03:59,042 You're not going already! 28 00:03:59,106 --> 00:04:02,837 Yeah, I'd better be off. You've got a really complicated life, Silvia. 29 00:04:36,237 --> 00:04:39,776 [speaking with thick Russian accent] Silvia! You having face like Russian who just finished all vodka. 30 00:04:39,911 --> 00:04:41,911 I could just do with a bottle right now in fact. 31 00:04:41,911 --> 00:04:46,610 What means? Do you can give me a summary of preceding episodes or otherwise it getting late for dinner. 32 00:04:46,904 --> 00:04:52,383 I went out with that really fit aerial fitter and one thing led to another and we ended up on the sofa 33 00:04:52,593 --> 00:04:55,894 Chiara came in from the balcony where she was having a joint and she caught us at it 34 00:04:55,899 --> 00:04:59,694 and now she's shut herself in her room pissed off with me but it's me who ought to be pissed off with her 35 00:04:59,699 --> 00:05:05,682 and then my mother called and she was pissed off with me 'cos I didn't call Alessia but I tried you know that 36 00:05:05,781 --> 00:05:08,906 and in all this I haven't got the foggiest idea where Emma's got to... 37 00:05:09,228 --> 00:05:12,744 Stop, stop, Silvia, your life is like TV series only one which makes you laughing 38 00:05:12,833 --> 00:05:15,672 Thank you for that Olga. And so what am I supposed to do? 39 00:05:16,076 --> 00:05:19,211 You call pretty capitalist girl, saying sorry 40 00:05:19,512 --> 00:05:24,012 and making so she laugh and so beginning romantic TV series 41 00:05:24,492 --> 00:05:28,006 I now going on balcony and eliminating all traces of drug 42 00:05:54,524 --> 00:05:56,928 - Thanks - Thanks 43 00:06:01,283 --> 00:06:05,967 - I behaved really terribly at the party - No, don't be silly 44 00:06:05,968 --> 00:06:09,668 I thought that game between you and your brother was really funny 45 00:06:09,908 --> 00:06:11,872 Oh, right, so you got what was going on? 46 00:06:11,874 --> 00:06:13,874 Well, yes, of course. It didn't take much. 47 00:06:14,485 --> 00:06:18,182 I used to play silly games like that with my cousins when I was little 48 00:06:18,233 --> 00:06:19,639 Yes, right, when you were little 49 00:06:19,927 --> 00:06:25,485 It's nice still wanting to play games. I've become too serious perhaps. 50 00:06:25,891 --> 00:06:29,006 Well, you're a woman with an important role. It's only normal. 51 00:06:29,362 --> 00:06:36,262 I've had to create this image of being hard and inflexible for my job, so I've got my problems too. 52 00:06:36,386 --> 00:06:37,949 But you've got a good career, haven't you? 53 00:06:37,961 --> 00:06:42,720 Yes, but I'm a woman and that annoys everybody 54 00:06:42,927 --> 00:06:47,717 I'm competent and good at my job but I can read in their eyes what they're thinking. 55 00:06:48,074 --> 00:06:49,514 And what are they thinking? 56 00:06:49,649 --> 00:06:53,502 That I should be at home surrounded by kids and not there breaking their balls. 57 00:06:54,134 --> 00:06:57,566 If you like I can lend you a homophobic teenager and a non-speaking kid 58 00:06:57,567 --> 00:06:59,067 You'd really make a great impression. 59 00:06:59,853 --> 00:07:01,221 That bad, eh? 60 00:07:02,119 --> 00:07:03,523 And what about your job. 61 00:07:04,124 --> 00:07:08,124 Between scratches your brother told me you're a research chemist 62 00:07:08,223 --> 00:07:09,723 Yes, but I'm temporary staff. 63 00:07:10,125 --> 00:07:12,925 Rather than confronting gender roles, it's more like we're up against ageism in reverse. 64 00:07:12,925 --> 00:07:16,625 We're young until we're 50 without touching even Botox. It saves quite a bit. 65 00:07:17,718 --> 00:07:19,721 You're really funny. 66 00:07:21,956 --> 00:07:27,616 Nobody really serious would have ever accepted an invitation to go out with me. 67 00:07:29,218 --> 00:07:30,320 Thanks! 68 00:07:32,773 --> 00:07:34,634 Why don't we play a game too? 69 00:07:35,084 --> 00:07:40,649 Ok, I can easily get drunk again but I can't honestly see you scratching your bum here in front of everybody. 70 00:07:40,649 --> 00:07:45,507 No, when I was little, I always used to play that game I like/I hate 71 00:07:46,216 --> 00:07:47,492 Ok, I'll start. 72 00:07:48,093 --> 00:07:56,993 I like eating uncooked tortellini from the packet and I hate... 73 00:07:57,862 --> 00:08:00,290 Kids who run around in restaurants 74 00:08:02,372 --> 00:08:05,398 Right, let's see... 75 00:08:05,814 --> 00:08:10,031 I like froth on beer and I hate... 76 00:08:10,968 --> 00:08:13,168 ...people who eat at the cinema. 77 00:08:14,769 --> 00:08:17,644 I hate techno music. 78 00:08:17,744 --> 00:08:24,144 I hate never knowing song titles. 79 00:08:25,375 --> 00:08:30,364 I like elegant summer ballroom dancing evenings. 80 00:08:30,528 --> 00:08:38,963 I like it how all the world around me shuts up when I start thinking about Chemistry. 81 00:08:40,634 --> 00:08:49,201 I like, sometimes, being up in the air with my head but down on the ground with my feet. 82 00:08:49,705 --> 00:08:55,504 I like hoarding all sorts of crap and I hate... 83 00:08:56,605 --> 00:08:59,004 ...fashion reports on the news. 84 00:08:59,405 --> 00:09:06,044 I like people who fix things and I hate... 85 00:09:06,841 --> 00:09:09,841 ...people who say "really sweet". 86 00:09:10,142 --> 00:09:15,609 I hate people who never say "I'm sorry". 87 00:09:15,942 --> 00:09:20,863 And I like sad, melancholy faces like Buster Keaton's. 88 00:09:21,981 --> 00:09:25,318 And I like those funny awkward ones like Woody Allen's. 89 00:09:27,871 --> 00:09:30,771 I like... 90 00:09:38,927 --> 00:09:42,806 What a stench, not even the food is normal in this house 91 00:09:42,886 --> 00:09:44,756 If you not liking, Skippit! 92 00:09:44,788 --> 00:09:49,582 - It's Skemmy, think you can manage that? - No, I meaning really skip it. There is door. 93 00:09:50,654 --> 00:09:54,802 What are you laughing at? Can't you see they're all mad and pervy round here? 94 00:09:54,827 --> 00:09:56,371 You watching your language little Miss Scruffy. 95 00:09:56,373 --> 00:09:59,473 Here nobody pervy. Mad, perhaps... 96 00:09:59,557 --> 00:10:03,523 Well, for me dykes, lezzies... they're all pervy. It's not normal. 97 00:10:03,582 --> 00:10:06,259 No, not diced lettuce. You scaring your sister. 98 00:10:06,259 --> 00:10:07,960 This evening only potatoes and sprouts. 99 00:10:08,017 --> 00:10:11,733 You know who I'm talking about. That sicko Silvia. 100 00:10:17,932 --> 00:10:19,946 Don't worry, little quite one. 101 00:10:19,947 --> 00:10:25,246 Silvia not sicko. Silvia lesbian and lesbianism is not sickness. 102 00:10:28,985 --> 00:10:31,209 But capitalism, YES! 103 00:10:36,339 --> 00:10:39,768 After certain encounters everything becomes easier. 104 00:10:39,835 --> 00:10:46,490 People get drunk on words and intimacy and then get close up because things need to be seen from close up. 105 00:10:46,892 --> 00:10:48,392 Always.