5 Matching Annotations
  1. Last 7 days
    1. Europium is used in the printing of euro banknotes. It glows red under UV light, and forgeries can be detected by the lack of this red glow.

      When they scan a bill they are looking for the europium flash.

  2. Jan 2020
    1. Low-energy light bulbs contain a little europium to give a more natural light, by balancing the blue (cold) light with a little red (warm) light.
  3. May 2019
    1. Lithium-ion batteries are key components for most consumer electronics, from cellphones and laptops to electric cars.

      the ions in the lithium is the competent that is found in phones.

    1. Cobalt's primary ores are cobaltite (CoAsS) and erythrite (Co3(AsO4)2). Cobalt is usually recovered as a byproduct of mining and refining nickel, silver, lead, copper and iron.

      this is where cobalt comes from