Radium (Ra)

Sifat-Sifat Umum

Simbol Ra
Nomor Atom 88
Berat atom (226)
Kelompok
2 (logam alkali tanah atau keluarga berilium)
IIA (IUPAC), IIA (CAS)
Solid, Conductor, Alkaline Earth Metal, Metal, Radioactive, Natural
Periode 7
Blok s

Media

Kepadatan 5.0 g/cm3
Isipadu Atom 45.2 cm3/mole
Radius Atom 2.33 angstroms
Radius Kovalen --
Crust Abundance 9.9E-12%
Crystal Structure Cubic: Body centered
Color Silver

Energi

Elektronegativitas 0.9 (Skala Pauling)
Afinitas Elektron --
Ionisasi Energi Pertama 509 kJ/mol
ke-2 Ionization Energy 979.0 kJ/mol
Kapasitas Panas Spesifik 0.094 J g−1 K−1
Konduktivitas Termal 18.6 W·m−1·K−1

Elektron & Oksidasi

Kondisi Oksidisasi 2
Elektron Setiap Kelopak 2 8 18 32 18 8 2
Konfigurasi Elektron [Rn] 7s2
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 7s2
Diagram Orbital
1s
↿⇂
2s
↿⇂
2p
↿⇂
↿⇂
↿⇂
3s
↿⇂
3p
↿⇂
↿⇂
↿⇂
3d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4s
↿⇂
4p
↿⇂
↿⇂
↿⇂
4d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4f
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
5s
↿⇂
5p
↿⇂
↿⇂
↿⇂
5d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
5f
 
 
 
 
 
 
 
6s
↿⇂
6p
↿⇂
↿⇂
↿⇂
6d
 
 
 
 
 
6f
 
 
 
 
 
 
 
7s
↿⇂
7p
 
 
 
7d
 
 
 
 
 
7f
 
 
 
 
 
 
 

Nuclear

Radioaktif Iya
Half Life 1.59×103
Lifetime 2.31×103y
Decay Alpha Emission

Media

Keplanetan Model Bohr Radium (Ra)
Diagram Dot Lewis Radium (Ra)
Description
Silvery-white metal. Intensely radioactive.
Uses
Used in treating cancer because of the gamma rays it gives off.
Sources
Found in uranium ores at 1 part per 3 million parts uranium.
Pronounciation (English)
RAY-di-em

Terjemahan

Afrikaans Radium
Aragonese Radio
العربية راديوم
Armãneashte Radiumu
asturianu Radiu
azərbaycan Radium
български Радий
বাংলা রেডিয়াম
brezhoneg Radiom
bosanski Radij[um]
Byelorussian Радый
Cebuano Radyo
čeština Radium
Chuvash Ради
Cymraeg Radi
dansk Radium
Deutsch Radium
Ελληνικά Ραδιο
English Radium
esperanto Radiumo
español Radio
eesti Raadium
euskara Radioa
فارسی رادیم
suomi Radium
føroyskt Radium
français Radium
furlan Radi
Frysk Radium
Gaeilge Raidiam
Gàidhlig Raidiam
galego Radio
ગુજરાતી રેડિયમનો
Gaelg Raadjum
Hakka Chinese Luì (鐳)
עברית רדיום
हिन्दी रेडियम
hrvatski Radij
magyar Rádium
հայերեն Ռադիում
Indonesia Radium
íslenska Radín
italiano Radio
日本語 ラジウム
ქართული რადიუმი
کٲشُر Rôd
қазақ тілі Радий
한국어 라듐
kurdî Radyûm
Komi Радий
kernewek Radyum
кыргызча Радий
Latin Radium
Lëtzebuergesch Radium
Lombard Ràdi
lingála Ladu
lietuvių Radis
latviešu Rādijs
Mari Радий
Māori Konuruke
македонски Радиум
മലയാളം റേഡിയം
монгол Ради
Мокшан Ради
Melayu Radium
Malti Radju[m]
Nahuatl Radio
Nederlands Radium
norsk Radium
Occitan Radi
ирон Радий
polski Rad
português Rádio
Runasimi Radyu q'illay
română Radiu
русский Радий
slovenčina Radium
slovenščina Radij
Samoan Radimi
Samogitian Radis
shqip Radium
српски Радијум
Southern Sotho Radiamo
svenska Radium
Kiswahili Radi
தமிழ் ரேடியம்
тоҷикӣ Радий
ไทย เรเดียม
Türkçe Radyum
ئۇيغۇرچە رادىي
українська Радій
o‘zbek Radiy
Tiếng Việt Rađi
Võro Raadium
中文

Sejarah

Ditemukan Di
1898
Ditemukan Oleh
Pierre and Marie Curie
Ditemukan Pada
France
Asal Kata
From the Latin word "radius" meaning "ray"