ACTINIUM SÖZCÜĞÜ İNGILIZCE DİLİNDE NE ANLAMA GELİR?
Aktinyum
Actinium, 1899 yılında keşfedilen, Ac sembolü ve atom numarası 89 olan radyoaktif bir kimyasal elementtir. İlk radyoaktif element izole edilmemiştir. Aktinyumdan önce polonyum, radyum ve radon gözlemlenmesine karşın, 1902 yılına kadar izole edilmemiştir. Actinium, periyodik tabloda actinium ile lawrencium arasında 15 benzer elementten oluşan bir grup olan actinide serisine ismi vermiştir. Yumuşak, gümüşi beyaz bir radyoaktif metal olan actinium, havadaki oksijen ve nem ile hızla tepki gösterir ve oksitlenmeyi önleyen beyaz bir aktif oksit kaplaması oluşturur. Çoğu lantanid ve aktinidlerde olduğu gibi, actinium hemen hemen tüm kimyasal bileşiklerde +3 oksidasyon durumu varsayar. Aktinyum, uranyum cevheri izlerinde izotop 227Ac olarak bulunur ve bu izotop ağırlıklı olarak beta partikülleri yayarak 21.772 yıllık yarı ömrüyle bozunur. Bir ton uranyum cevheri yaklaşık 0.2 miligram aktif madde içeriyor. Aktinyum ve lantan'ın fiziksel ve kimyasal özelliklerinin yakın benzerliği, aktinyum madeninin cevherden ayrılmasını pratik yapmaz hale getirir. Bunun yerine, element, bir nükleer reaktörde 226Ra nötron ışınlaması ile, miligram miktarları ile hazırlanır.
İngilizce sözlükte actinium sözcüğünün tanımı
Sözlükteki actinium'un tanımı, uranyumun bozunum ürünü olarak ortaya çıkan, aktinit serisinin radyoaktif bir elementidir. Alfa parçacık kaynağı olarak ve nötron üretiminde kullanılır. Sembol: Ac; atom numarası: 89; En istikrarlı izotopun yarı ömrü, 227Ac: 21.6 yıl; bağıl yoğunluk: 10.07; erime noktası: 1051 ° C; Kaynama noktası: 3200 ± 300 ° C.
«ACTINIUM» İLE İLİŞKİLİ İNGILIZCE KİTAPLAR
actinium sözcüğünün kullanımını aşağıdaki kaynakça seçkisinde keşfedin.
actinium ile ilişkili kitaplar ve İngilizce edebiyattaki kullanımı ile ilgili bağlam sağlaması için küçük metinler.
1
The History and Use of Our Earth's Chemical Elements: A ...
Characteristics Actinium is the last (bottom) member of group 3 (IIIB) of elements
in the periodic table and the first of the actinide series of metallic elements that
share similar chemical and physical characteristics. Actinium is also closely ...
Actinium trifluoride can be produced either in solution or in solid reaction. The
former reaction is carried out at room temperature, by adding hydrofluoric acid to
a solution containing actinium ions. In the latter method, actinium metal is treated
...
3
The Radiochemistry of the Rare Earths: Scandium, Yttrium, ...
To aqueous layer containing actinium, rare-earth, and other activities add NHjOH
to adjust pH to 5. 5-7. 0. 12. Add 10 ml TTA-benzene. Stir. Recheck pH. Contact
20 minutes . 13. Pipet benzene layer containing actinium and rare earths into ...
Peter Cooper Stevenson, W. E. Nervik,
1961
4
The
Actinium-Uranium Ratio in Colorado Carnotite
This is a pre-1923 historical reproduction that was curated for quality. Quality assurance was conducted on each of these books in an attempt to remove books with imperfections introduced by the digitization process.
Fussler Karl Hartley,
2009
5
Chemistry and Analysis of Radionuclides: Laboratory ...
After , the longest-lived isotope of actinium is , which has a half-life of 10 days. It
is the daughter of beta-emitting and is used as a tracer in analyses. Neither nor
its parent occur naturally, but the latter is milked from a generator of artificially ...
Jukka Lehto, Xiaolin Hou,
2011
6
The Chemical News and Journal of Physical Science
I. Radio-actinium. In earlier articles (Berichte, 1904. xxxvii., 1697; 1905, xxxviii.,
778) I have already stated that the artificial barium sulphate precipitates obtained
from emanium solutions retain their activity for many months. Also, I noticed that ...
It was suggested some time ago that actinium is itself the true parent of radium,
but no definite evidence has been brought forward to prove this. The matter has
been under investigation for some time by E. Rutherford, and he gives here a ...
8
The Collected Papers of Lord Rutherford of Nelson
the precipitate produced fresh actinium X and the density rose. The gradual fall of
the activity to a constant value is due to the decay of the excess of the
radioactinium together with its transformation products. The activity curve will be
seen to ...
iso NA half-life DM DE (MeV) DP 225Ac syn 10 d α 5.935 221Fr 226 Ac syn 29.37
h β− 1.117 226Th ε 0.640 226Ra α 5.536 222Fr 227 Ac 100% 21.773 y β− 0.045
227Th α 5.042 223Fr Actinium ( /ækˈtɪniəm/ ak-tin-nee-əm) is a radioactive ...
10
A Glossary of Terms in Nuclear Science and Technology
The compounds of the elements beyond actinium in this state are generally
isostructural with the corresponding ones of actinium and of the lanthanides.
Compare similar usage for thorides, protactinides, and uranides. actinium (Ac) An
...
National Research Council (U.S.). Conference on Glossary of Terms in Nuclear Science and Technology,
1957
«ACTINIUM» TERİMİNİ İÇEREN HABERLER
Ulusal ve uluslararası basında konuşulanları ve
actinium teriminin aşağıdaki haberlerde hangi bağlamda kullanıldığını keşfedin.
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