Să̤ (gó-tā̤)

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Sele­n   34Se
Kĭng(gì-tă hĭ-gĭng-sṳ̆k)
Hâi(hĭ-iū ké-tā̤)
Lī (gĭng-sṳ̆k)(giĕng-gĭng-sṳ̆k)
Pì (gĭng-sṳ̆k)(giĕng-tū gĭng-sṳ̆k)
Bèng(lôi-gĭng-sṳ̆k)
Táng(gì-tă hĭ-gĭng-sṳ̆k)
Dâng(gì-tă hĭ-gĭng-sṳ̆k)
Iōng(gì-tă hĭ-gĭng-sṳ̆k)
Hók (nguòng-só)(lū-só)
Neon(hĭ-iū ké-tā̤)
Năk(giĕng-gĭng-sṳ̆k)
Mī (gĭng-sṳ̆k)(giĕng-tū gĭng-sṳ̆k)
Lé̤ṳ(bìng-gĭng-sṳ̆k)
Sĭk (nguòng-só)(lôi-gĭng-sṳ̆k)
Lìng (nguòng-só)(gì-tă hĭ-gĭng-sṳ̆k)
Liù-uòng(gì-tă hĭ-gĭng-sṳ̆k)
Lṳ̆k (nguòng-só)(lū-só)
Ā (nguòng-só)(hĭ-iū ké-tā̤)
Gák (gĭng-sṳ̆k)(giĕng-gĭng-sṳ̆k)
Gái (gĭng-sṳ̆k)(giĕng-tū gĭng-sṳ̆k)
Scandium(guó-dô gĭng-sṳ̆k)
Titanium(guó-dô gĭng-sṳ̆k)
Vanadium(guó-dô gĭng-sṳ̆k)
Gáuk (gĭng-sṳ̆k)(guó-dô gĭng-sṳ̆k)
Mâing (gĭng-sṳ̆k)(guó-dô gĭng-sṳ̆k)
Tiék(guó-dô gĭng-sṳ̆k)
Gū (gĭng-sṳ̆k)(guó-dô gĭng-sṳ̆k)
Ngiĕk(guó-dô gĭng-sṳ̆k)
Dè̤ng(guó-dô gĭng-sṳ̆k)
Ā-iòng(guó-dô gĭng-sṳ̆k)
Gallium(bìng-gĭng-sṳ̆k)
Germanium(lôi-gĭng-sṳ̆k)
Piĕ (nguòng-só)(lôi-gĭng-sṳ̆k)
Să̤ (gó-tā̤)(gì-tă hĭ-gĭng-sṳ̆k)
Chéu (nguòng-só)(lū-só)
Káik (nguòng-só)(hĭ-iū ké-tā̤)
Rubidium(giĕng-gĭng-sṳ̆k)
Strontium(giĕng-tū gĭng-sṳ̆k)
Yttrium(guó-dô gĭng-sṳ̆k)
Zirconium(guó-dô gĭng-sṳ̆k)
Niobium(guó-dô gĭng-sṳ̆k)
Mŭk (gĭng-sṳ̆k)(guó-dô gĭng-sṳ̆k)
Technetium(guó-dô gĭng-sṳ̆k)
Ruthenium(guó-dô gĭng-sṳ̆k)
Rhodium(guó-dô gĭng-sṳ̆k)
Bă (gĭng-sṳ̆k)(guó-dô gĭng-sṳ̆k)
Ngṳ̀ng(guó-dô gĭng-sṳ̆k)
Gáik (gĭng-sṳ̆k)(guó-dô gĭng-sṳ̆k)
Indium(bìng-gĭng-sṳ̆k)
Sék(bìng-gĭng-sṳ̆k)
Dà̤ (gĭng-sṳ̆k)(lôi-gĭng-sṳ̆k)
Dá̤ (nguòng-só)(lôi-gĭng-sṳ̆k)
Diēng(lū-só)
Să̤ (ké-tā̤)(hĭ-iū ké-tā̤)
Caesium(giĕng-gĭng-sṳ̆k)
Barium(giĕng-tū gĭng-sṳ̆k)
Lanthanum(lanthanum-hiê)
Cerium(lanthanum-hiê)
Praseodymium(lanthanum-hiê)
Neodymium(lanthanum-hiê)
Promethium(lanthanum-hiê)
Samarium(lanthanum-hiê)
Europium(lanthanum-hiê)
Gadolinium(lanthanum-hiê)
Terbium(lanthanum-hiê)
Dysprosium(lanthanum-hiê)
Holmium(lanthanum-hiê)
Erbium(lanthanum-hiê)
Thulium(lanthanum-hiê)
Ytterbium(lanthanum-hiê)
Lutetium(lanthanum-hiê)
Hafnium(guó-dô gĭng-sṳ̆k)
Tantalum(guó-dô gĭng-sṳ̆k)
Ŭ (gĭng-sṳ̆k)(guó-dô gĭng-sṳ̆k)
Rhenium(guó-dô gĭng-sṳ̆k)
Osmium(guó-dô gĭng-sṳ̆k)
Iridium(guó-dô gĭng-sṳ̆k)
Băh-gĭng(guó-dô gĭng-sṳ̆k)
Gĭng(guó-dô gĭng-sṳ̆k)
Cūi-ngṳ̀ng(guó-dô gĭng-sṳ̆k)
Thallium(bìng-gĭng-sṳ̆k)
Iòng (gĭng-sṳ̆k)(bìng-gĭng-sṳ̆k)
Bék (gĭng-sṳ̆k)(bìng-gĭng-sṳ̆k)
Polonium(bìng-gĭng-sṳ̆k)
Astatine(lū-só)
Radon(hĭ-iū ké-tā̤)
Francium(giĕng-gĭng-sṳ̆k)
Lòi (gĭng-sṳ̆k)(giĕng-tū gĭng-sṳ̆k)
Actinium(actinium-hiê)
Thorium(actinium-hiê)
Protactinium(actinium-hiê)
Iù (gĭng-sṳ̆k)(actinium-hiê)
Neptunium(actinium-hiê)
Plutonium(actinium-hiê)
Americium(actinium-hiê)
Curium(actinium-hiê)
Berkelium(actinium-hiê)
Californium(actinium-hiê)
Einsteinium(actinium-hiê)
Fermium(actinium-hiê)
Mendelevium(actinium-hiê)
Nobelium(actinium-hiê)
Lawrencium(actinium-hiê)
Rutherfordium(guó-dô gĭng-sṳ̆k)
Dubnium(guó-dô gĭng-sṳ̆k)
Seaborgium(guó-dô gĭng-sṳ̆k)
Bohrium(guó-dô gĭng-sṳ̆k)
Hassium(guó-dô gĭng-sṳ̆k)
Meitnerium(mâ̤ hiēu dĕk-séng)
Darmstadtium(mâ̤ hiēu dĕk-séng)
Roentgenium(mâ̤ hiēu dĕk-séng)
Copernicium(guó-dô gĭng-sṳ̆k)
Nihonium(mâ̤ hiēu dĕk-séng)
Flerovium(bìng-gĭng-sṳ̆k)
Moscovium(mâ̤ hiēu dĕk-séng)
Livermorium(mâ̤ hiēu dĕk-séng)
Tennessine(mâ̤ hiēu dĕk-séng)
Oganesson(mâ̤ hiēu dĕk-séng)
Liù-uòng

Sele­n

Telua
PiĕSele­nChéu
ngôi-guăng
black, red, and gray (not pictured) allotropes
gái-huóng
miàng-cê·hù-hô̤·sê̤ṳ-só Sele­n (selenium)·Se·34
nguòng-só lôi-biék hĭ-gĭng-sṳ̆k
sometimes considered a metalloid
cŭk·ciŭ-gĭ·kṳ̆ 16·4·p
nguòng-cṳ̄-liông 78.971(8)
diêng-cṳ̄ bà̤-buó

[Ar] 3d10 4s2 4p4
2, 8, 18, 6

Sele­n gì diêng cṳ̄ cèng (2, 8, 18, 6)
Lĭk-sṳ̄
ŭk-lī séng-cék
ŭk-tái gó-tā̤
mĭk-dô̤ (ciék-gê̤ṳng sék-ŭng)
gray: 4.81 g·cm−3
mĭk-dô̤ (ciék-gê̤ṳng sék-ŭng)
alpha: 4.39 g·cm−3
mĭk-dô̤ (ciék-gê̤ṳng sék-ŭng)
vitreous: 4.28 g·cm−3
iòng-diēng sèng-âu gì ĭk-tā̤ mĭk-dô̤ 3.99 g·cm−3
iòng-diēng 494 K,221 °C,430 °F
bé-diēng 958 K,685 °C,1265 °F
lìng-gái-diēng 1766 K, 27.2 MPa
iòng iĕk gray: 6.69 kJ·mol−1
ké-huá iĕk 95.48 kJ·mol−1
bī-iĕk-ṳ̀ng 25.363 J·mol−1·K−1

cĭng-ké-ák

ák/Pa 1 10 100 1 k 10 k 100 k
ŭng/K 500 552 617 704 813 958
nguòng-cṳ̄ séng-cék
iōng-huá-tái 6, 5, 4, 3, 2, 1,[1] −1, −2
((a strongly acidic oxide))
diêng-hô-séng 2.55 (Pauling biĕu-dô)
diêng-liê-nèng

dâ̤ 1: {{{1st ionization energy}}} kJ·mol−1
dâ̤ 2: {{{2nd ionization energy}}} kJ·mol−1

dâ̤ 3: {{{3rd ionization energy}}} kJ·mol−1
nguòng-cṳ̄ buáng-géng 120 pm
gê̤ṳng-gá buáng-géng 120±4 pm
Van der Waals buáng-géng 190 pm
gì-tă
cĭng-tā̤ giék-gáiu

hexagonal

Sele­n ô hexagonal cĭng-tā̤ giék-gáiu
Cṳ̀-sê̤ṳ diamagnetic
iĕk-dô̤-lŭk amorphous: 0.519 W·m−1·K−1
pàng-dióng hiê-só (25 °C)amorphous: 37 µm·m−1·K−1
siăng-sók (20 °C)3350 m·s−1
Young muò-liông 10 GPa
cēng-ciék muò-liông 3.7 GPa
tā̤-cék muò-liông 8.3 GPa
Poisson bī 0.33
Mohs ngâing-dô̤ 2.0
Brinell ngâing-dô 736 MPa
CAS hô̤ 7782-49-2
có̤i ūng-diâng gì dùng-ôi-só


dùng-ôi-só hŭng-dô buáng-sŏi-gĭ huŏng-sék nèng-liôngMeV sāng-ŭk
72Se syn 8.4 d ε 72As
γ 0.046
74Se 0.87% (β+β+) 1.2094 74Ge
75Se syn 119.779 d ε 75As
γ 0.264, 0.136,
0.279
76Se 9.36% ūng-dêng, dái 42 ciáh dṳ̆ng-cṳ̄
77Se 7.63% ūng-dêng, dái 43 ciáh dṳ̆ng-cṳ̄
78Se 23.78% ūng-dêng, dái 44 ciáh dṳ̆ng-cṳ̄
79Se trace 3.27×105 y β 0.151 79Br
80Se 49.61% (ββ) 0.1339 80Kr
82Se 8.73% 1.08×1020 y ββ 2.995 82Kr
Decay modes in parentheses are predicted, but have not yet been observed

Să̤ (硒) sê siŏh cṳ̄ng hĭ-gĭng-sṳ̆k nguòng-só. Nguòng-cṳ̄ sê̤ṳ-só sê 34, huá-hŏk hù-hô̤ sê Se.

Huá-hŏk séng-cék[Siŭ-gāi | Gāi nguòng-mā]

Éng-ê̤ṳng[Siŭ-gāi | Gāi nguòng-mā]

Cié-chṳ̄[Siŭ-gāi | Gāi nguòng-mā]

Chăng-kō̤ cṳ̆-lâiu[Siŭ-gāi | Gāi nguòng-mā]

  1. Greenwood, N. N.; Earnshaw, A. Chemistry of the Elements 2nd. Oxford:Butterworth-Heinemann. 1997. ISBN 0-7506-3365-4.