question:
1. On January 7, 1939, __________ _____ discovered francium by refining actinium-227. She originally called it “Catium,” but her boss, Irène Joliot-Curie, told her to change it to “Francium,” especially since “Catium” sounded too much like something related to cats. I suggested it. Please fill in the blanks.
2. Name the alkali metals commonly used as cathodes (in oxide form) in batteries. It is prized for this particular application because it allows ions to move between the layers of graphite that make up the anode.
3. This element – an alkali metal – is the sixth most abundant element in the Earth’s crust, after calcium and after magnesium. Industries that use it include food preparation and preservation, pharmaceuticals, metallurgy, astronomy, and nuclear reactors (as a coolant). Name this metal.
4. This alkali metal makes up about 0.2% of the human body’s mass and its main source in food is fruits. Its name comes from the pre-industrial practice of steeping plant ashes in pots for use in fertilizer, which produced this element. Name this metal.
5. This alkali metal is liquid at room temperature and normal pressure. There is a possibility of spontaneous combustion. Most of its chemical properties center on the fact that it is the most eager of all elements to release electrons in reactions. Name this metal.
visual:
This alkali metal’s name means “crimson” in Latin, and its color glows when heated like the flame above. Name it.
answer:
1. Marguerite Perret
2. Lithium
3. Sodium
4. Potassium
5. Cesium
Visual: Rubidium
This is a premium article available to subscribers only.Read over 250 premium articles every month
You have exhausted your free article limit. Please support quality journalism.
You have exhausted your free article limit. Please support quality journalism.
read {{data.cm.views}} out of {{data.cm.maxViews}} Free articles.
This is the last free article.
