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Erbium is a chemical element; it has symbol Er and atomic number 68. A silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. It is a lanthanide, a rare-earth element, originally found in the gadolinite mine in Ytterby, Sweden, which is the source of the element's name.
It is a silvery white metal, which resists corrosion in dry air, but not in moist air. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earth elements; it can also be classified as the first element of the 6th-period transition metals. [8]
Rubidium is a very soft, ductile, silvery-white metal. [11] It has a melting point of 39.3 °C (102.7 °F) and a boiling point of 688 °C (1,270 °F). [ 12 ] It forms amalgams with mercury and alloys with gold , iron , caesium , sodium , and potassium , but not lithium (despite rubidium and lithium being in the same periodic group). [ 13 ]
Under standard conditions, germanium is a brittle, silvery-white, [34] semiconductor. This form constitutes an allotrope known as α-germanium , which has a metallic luster and a diamond cubic crystal structure , the same structure as silicon and diamond . [ 32 ]
Thallium is the first element in group 13 where the reduction of the +3 oxidation state to the +1 oxidation state is spontaneous under standard conditions. [11] Since bond energies decrease down the group, with thallium, the energy released in forming two additional bonds and attaining the +3 state is not always enough to outweigh the energy ...
Europium is a chemical element; it has symbol Eu and atomic number 63. It is a silvery-white metal of the lanthanide series that reacts readily with air to form a dark oxide coating. Europium is the most chemically reactive, least dense, and softest of the lanthanides.
But, White recalled funnier — and even more NSFW answers — throughout her 42 years on the show. "There was the guy who thought it was a 'Styrofoam Hat' instead of 'Styrofoam Cup,'" she said.
Roman numerals: for example the word "six" in the clue might be used to indicate the letters VI; The name of a chemical element may be used to signify its symbol; e.g., W for tungsten; The days of the week; e.g., TH for Thursday; Country codes; e.g., "Switzerland" can indicate the letters CH; ICAO spelling alphabet: where Mike signifies M and ...