| 00:00 - 00:03 | The OCR AS chemical bonding appears easy to learn |
| 00:04 - 00:05 | Ionic is the electrostatic attraction |
| 00:05 - 00:07 | between oppositely charged ions |
| 00:08 - 00:12 | The strong forces between the ions give the structure |
| 00:12 - 00:15 | high melting and boiling points. |
| 00:17 - 00:19 | I can remember that. |
| 00:19 - 00:21 | At least until the exam in June. |
| 00:24 - 00:26 | Sir... |
| 00:27 - 00:28 | That's... |
| 00:31 - 00:33 | That's far from everything. |
| 00:34 - 00:36 | There's more ionic to learn, and then the metallic, |
| 00:53 - 00:58 | the covalent and the intermolecular. |
| 01:13 - 01:15 | What are OCR thinking? |
| 01:15 - 01:17 | Giving us so much to learn |
| 01:18 - 01:23 | Over such a short Easter break? |
| 01:25 - 01:28 | What do they think is going to happen? |
| 01:29 - 01:31 | We're going to fail! |
| 01:31 - 01:34 | Just because we did this at GCSE |
| 01:34 - 01:37 | does not mean we remember any of it! |
| 01:37 - 01:40 | Ionic, they said. |
| 01:40 - 01:42 | Can conduct electricity in aqueous solution or molten form. |
| 01:42 - 01:46 | Did I ask for your opinion? |
| 01:46 - 01:48 | Sir, it's not an opinion. It is a fact ionic compounds dissolve in polar solvents. |
| 01:48 - 01:52 | And then there's all that metallic to learn! |
| 01:53 - 01:54 | The electrostatic attraction between |
| 01:56 - 01:57 | positive metal ions and |
| 01:57 - 02:00 | delocalised electrons, shared between |
| 02:00 - 02:03 | more than two atoms! And all |
| 02:04 - 02:08 | arranged in a giant metallic lattice. |
| 02:08 - 02:13 | They have high melting and boiling points |
| 02:14 - 02:16 | They have good electrical conductivity |
| 02:17 - 02:21 | because the delocalised electrons can move freely within the metallic lattice. |
| 02:27 - 02:29 | Even though the attraction between the electrons and the ions is strong! |
| 02:30 - 02:34 | And they are ductile and malleable! |
| 02:34 - 02:36 | And then they can be alloys! |
| 02:41 - 02:42 | Changing their... |
| 02:43 - 02:47 | Changing their properties altogether |
| 02:48 - 02:53 | I am sick of this. Covalent is the way to go. |
| 02:54 - 02:56 | Simple or giant lattices. |
| 02:56 - 02:59 | What do they think they're playing at? |
| 03:00 - 03:02 | Just pick a structure! |
| 03:04 - 03:07 | It's okay Anna, we all think he'll fail too |
| 03:14 - 03:16 | In the simple lattice, there are strong intra and weak inter forces |
| 03:19 - 03:23 | So they have a low melting and boiling point |
| 03:25 - 03:26 | They don't conduct |
| 03:31 - 03:33 | Soluble. In non-polar solvents. |
| 03:40 - 03:46 | But in their giant form |
| 03:46 - 03:49 | they have high melting and boiling points. |
| 03:53 - 03:56 | and aren't soluble or conductors. |
