Indium with proton number 49 is in Group 13 while antimony with proton number 51 is in Group 15 of the Periodic Table.Which of the following statements about indium and antimony is correct?
A.antimony has more metallic property and more valence electrons than indium.
B.indium has more metallic property and more valence electron than antimony.
C.indium has more metallic property and antimony has more valence electron.
D.antimony has more metallic property and indium has more valence electron.
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Indium is a chemical element with the symbol In and atomic number 49. Indium is the softest metal that is not an alkali metal. It is a silvery-white metal that resembles tin in appearance. It is a post-transition metal that makes up 0.21 parts per million of the Earth's crust. Indium has a melting point higher than sodium and gallium, but lower than lithium and tin. Chemically, indium is similar to gallium and thallium, and it is largely intermediate between the two in terms of its properties.[6] Indium was discovered in 1863 by Ferdinand Reich and Hieronymous Theodor Richter by spectroscopic methods. They named it for the indigo blue line in its spectrum. Indium was isolated the next year.
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