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The Gmelin rare earths handbook lists 1522 °C and 1550 °C as two melting points given in the literature, the most recent reference [Handbook on the chemistry and physics of rare earths, vol.12 (1989)] is given with 1529 °C.
A period 3 element is one of the chemical elements in the third row (or period) of the periodic table of the chemical elements.The periodic table is laid out in rows to illustrate recurring (periodic) trends in the chemical behavior of the elements as their atomic number increases: a new row is begun when chemical behavior begins to repeat, meaning that elements with similar behavior fall into ...
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1.3 Period 3. 1.4 Period 4. 1.5 Period 5. ... and in the f-block elements show a high degree of similarity across ... has one of the highest melting points of all the ...
Trend-wise, while moving from left to right across a period, the number of valence electrons of elements increases and varies between one and eight. But the valency of elements first increases from 1 to 4, and then it decreases to 0 as we reach the noble gases .
On average for the 12 lanthanides, the melting point (on the Kelvin scale) = 1.92x the density (in g/cm^3) while the three elements following the lanthanides have similar values at 188x, 197x, and 192x before the densities continue to increase but the melting points decrease for the next 2 elements followed by both properties decreasing (at ...
Np 912±3 K (639±3 °C) Pu 912.5 K (639.4 °C) Am 1449 K (1176 °C) Cm 1613 K (1340 °C) Bk 1259 K (986 °C) Cf 1173 K (900 °C) Es 1133 K (860 °C) Fm 1800 K (1527 °C) Md 1100 K (827 °C) No 1100 K (827 °C) Legend: Values are in Kelvin K and Celsius °C, rounded For the equivalent in Fahrenheit °F, see: Melting points of the elements (data ...
Boron (1s 2 2s 2 2p 1) puts its new electron in a 2p orbital; carbon (1s 2 2s 2 2p 2) fills a second 2p orbital; and with nitrogen (1s 2 2s 2 2p 3) all three 2p orbitals become singly occupied. This is consistent with Hund's rule , which states that atoms usually prefer to singly occupy each orbital of the same type before filling them with the ...