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mercury (element)
Science; General science
A chemical element, Hg, atomic number 80 and atomic weight 200.59. Mercury is a silverwhite liquid at room temperature (melting point −38.89°C or −37.46°F); it boils at 357.25°C ...
holmium
Science; General science
A chemical element, Ho, atomic number 67, atomic weight 164.93, a metallic element belonging to the rare-earth group. The stable isotope 165 Ho makes up 100% of the naturally ...
indium
Science; General science
A chemical element, In, atomic number 49, a member of group 13 and the fifth period of the periodic table. Indium has a relative atomic weight of 114.82. Indium occurs in the ...
iridium
Science; General science
A chemical element, Ir, atomic number 77, relative atomic weight 192.22. Iridium is a transition metal and shares similarities with rhodium as well as the other platinum metals, ...
potassium
Science; General science
A chemical element, K, atomic number 19, and atomic weight 39.102. It stands in the middle of the alkali metal family, below sodium and above rubidium. This lightweight, soft, ...
lanthanum
Science; General science
A chemical element, La, atomic number 57, atomic weight 138.91. Lanthanum, the second most abundant element in the rare-earth group, is a metal. The naturally occurring element is ...
lithium
Science; General science
A chemical element, Li, atomic number 3, and atomic weight 6.939. Lithium heads the alkali metal family in the periodic table. In nature it is a mixture of the isotopes 6 Li and ...
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