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Aluminium's is 75.2 GPa; copper's 137.8 GPa; and mild steel's is 160–169 GPa.
Thorium's melting point of 1750 °C is above both those of actinium (1227 °C) and protactinium (1568 °C).
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Thorium is an electropositive actinide whose chemistry is dominated by the 4 oxidation state; it is quite reactive and can ignite in air when finely divided.
Thorium is weakly radioactive: all of its known isotopes are unstable.
Thorium forms eutectic mixtures with chromium and uranium, and it is completely miscible in both solid and liquid states with its lighter congener cerium.Im looking for that fun loving (hopefully drama free) girl that just wants to enjoy life and love and passion with me.I was told I am shy but once you get to know me and I open up I can be a little naughty. I'm 27, if you don't like my dog chances are we won't like you either. I recently got off of active duty from the Marine corps and still in the reserves, and now I work at a nuclear power plant.In the beginning of period 7, from francium to thorium, the melting points of the elements increase (as in other periods), because the number of delocalised electrons each atom contributes increases from one in francium to four in thorium, leading to greater attraction between these electrons and the metal ions as their charge increases from one to four.After thorium, there is a new downward trend in melting points from thorium to plutonium.
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