Questions:
1. On January 7, 1939, __________ _____ found francium by purifying actinium-227. She initially referred to as it ‘catium’, however her supervisor Irène Joliot-Curie instructed she change it to ‘francium’ as a result of, amongst different issues, ‘catium’ sounded an excessive amount of prefer it was cat-related. Fill within the blanks.
2. Name the alkali metallic that’s typically utilized in electrical batteries because the cathode (in an oxide kind). It is prized for this specific utility due to its ions’ means to maneuver between the layers of graphite, which make up the anode.
3. This aspect – an alkali metallic – is the sixth most ample within the earth’s crust, after calcium and earlier than magnesium. Industries that use it embody meals preparation and preservation, drug-making, metallurgy, astronomy, and nuclear reactors (as a coolant). Name this metallic.
4. This alkali metallic makes up round 0.2% of the human physique by mass, and its principal supply in meals is fruits. Its identify comes from the pre-industrial follow of soaking the ashes of vegetation in a pot, which yields this aspect, to be used in fertilisers. Name this metallic.
5. This alkali metallic is liquid at room temperature and stress. It can spontaneously catch fireplace. Most of its chemical properties are centred on the truth that that is probably the most keen of all parts to present away an electron in a response. Name this metallic.
Visual:
This alkali metallic will get its identify from Latin for ‘deep red’, which is the color with which it glows when heated – like within the flame above. Name it.
Answers:
1. Marguerite Perey
2. Lithium
3. Sodium
4. Potassium
5. Caesium
Visual: Rubidium
