WJEC GCSE Chemistry Unit 2: The 60-Second Revision Drill 🧪 (A* Guide)

追加: 2026-05-05

[00:00:01][music] >> Listen up year 11, WJEC, unit two chemistry. [music] Let's get the top grade, G.

[00:00:09]Yeah.

[00:00:10]Yeah.

[00:00:11]Yeah.

[00:00:13]Start with a bond and sharing is [music] caring. Covalent is the name. Nonmetals are pairing, but if it's a metal and nonmetal, trapped electrons are lost or gained. That's ionic, no cap. Check the periodic table, [music and singing] don't be a fool. Groups are the columns, periods are the rows.

[00:00:24]That's the rule.

[00:00:26]>> [music] >> Double bonds in the alkene, CnH2n, know what I mean? Cracking the long chains, making [music] them small for fuel or for plastic, we're having it all.

[00:00:34]Haber process, making ammonia. Nitrogen from air, hydrogen from methane. A reversible reaction, check the symbol, it's wavy. 450°, don't be lazy. Iron [music] catalyst speeds up the flow. 200 atmospheres, now you're in the know.

[00:00:44]Test it for ions, [singing] don't lose your head. Flame test for lithium, that flame's burning red. Sodium is yellow, potassium is [music] lilac. Barium is green, put your grades on a stack.

[00:00:51]Balance the symbols, watch the mass increase. Unit two mastered, go rest in peace. Chemistry lockdown, [music] I can mix out.