Stronsium: Perbedaan antara revisi

Tekanan uap
	rubidium ← strontium → yttrium
Keterangan Umum Unsur
Nama, Lambang, Nomor atom	strontium, Sr, 38
Deret kimia	alkaline earth metals
Golongan, Periode, Blok	2, 5, s
Penampilan	silvery white metallic ;
Massa atom	87.62(1) g/mol
Konfigurasi elektron	[Kr] 5s2
Jumlah elektron tiap kulit	2, 8, 18, 8, 2
Ciri-ciri fisik
Fase	solid
Massa jenis (sekitar suhu kamar)	2.64 g/cm³
Massa jenis cair pada titik lebur	6.980 g/cm³
Titik lebur	1050 K; (777 °C, 1431 °F)
Titik didih	1655 K; (1382 °C, 2520 °F)
Kalor peleburan	7.43 kJ/mol
Kalor penguapan	136.9 kJ/mol
Kapasitas kalor	(25 °C) 26.4 J/(mol·K)
Ciri-ciri atom
Struktur kristal	cubic face centered
Bilangan oksidasi	2; (strongly basic oxide)
Elektronegativitas	0.95 (skala Pauling)
Energi ionisasi; (detail)	ke-1: 549.5 kJ/mol
	ke-2: 1064.2 kJ/mol
	ke-3: 4138 kJ/mol
Jari-jari atom	200 pm
Jari-jari atom (terhitung)	219 pm
Jari-jari kovalen	192 pm
Lain-lain
Sifat magnetik	paramagnetic
Resistivitas listrik	(20 °C) 132 nΩ·m
Konduktivitas termal	(300 K) 35.4 W/(m·K)
Ekspansi termal	(25 °C) 22.5 µm/(m·K)
Modulus geser	6.1 GPa
Nisbah Poisson	0.28
Skala kekerasan Mohs	1.5
Nomor CAS	7440-24-6
Isotop
β+	83Rb
γ	-
γ	-
β-	-
Referensi

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Revisi per 10 Maret 2008 02.08

Strontium adalah unsur kimia dengan lambang Sr dan nomor atom 38. An alkaline earth metal, strontium is a soft silver-white or yellowish metallic element that is highly reactive chemically. This metal turns yellow when exposed to air and occurs in celestite and strontianite. ⁹⁰Sr is present in radioactive fallout and has a half-life of 28.90 years.

Artikel bertopik kimia ini adalah sebuah rintisan. Anda dapat membantu Wikipedia dengan mengembangkannya.

@@ Baris 36: / Baris 36: @@
 {{Elementbox_isotopes_decay | mn=82 | sym=Sr
  | na=[[synthetic radioisotope|syn]] | hl=25.36 [[day|d]]
- | dm=[[electron capture|&epsilon;]] | de=- | pn=82 | ps= [[rubidium|Rb]] }}
+ | dm=[[electron capture|ε]] | de=- | pn=82 | ps= [[rubidium|Rb]] }}
 {{Elementbox_isotopes_decay3 | mn=83 | sym=Sr
  | na=[[synthetic radioisotope|syn]] | hl=1.35 d
- | dm1=&epsilon; | de1=- | pn1=83 | ps1=[[rubidium|Rb]]
+ | dm1=ε | de1=- | pn1=83 | ps1=[[rubidium|Rb]]
- | dm2=[[positron emission|&beta;<sup>+</sup>]] | de2=1.23 | pn2=83 | ps2=[[rubidium|Rb]]
+ | dm2=[[positron emission|β<sup>+</sup>]] | de2=1.23 | pn2=83 | ps2=[[rubidium|Rb]]
- | dm3=[[gamma radiation|&gamma;]] | de3=0.76, 0.36 | pn3= | ps3=- }}
+ | dm3=[[gamma radiation|γ]] | de3=0.76, 0.36 | pn3= | ps3=- }}
 {{Elementbox_isotopes_stable | mn=84 | sym=Sr | na=0.56% | n=46 }}
 {{Elementbox_isotopes_decay2 | mn=85 | sym=Sr
  | na=[[synthetic radioisotope|syn]] | hl=64.84 d
- | dm1=&epsilon; | de1=- | pn1=85 | ps1=[[rubidium|Rb]]
+ | dm1=ε | de1=- | pn1=85 | ps1=[[rubidium|Rb]]
- | dm2=&gamma; | de2=0.514[[delayed nuclear radiation|D]] | pn2= | ps2=- }}
+ | dm2=γ | de2=0.514[[delayed nuclear radiation|D]] | pn2= | ps2=- }}
 {{Elementbox_isotopes_stable | mn=86 | sym=Sr | na=9.86% | n=48 }}
 {{Elementbox_isotopes_stable | mn=87 | sym=Sr | na=7.0% | n=49 }}
@@ Baris 52: / Baris 52: @@
 {{Elementbox_isotopes_decay2 | mn=89 | sym=Sr
  | na=[[synthetic radioisotope|syn]] | hl=50.52 d
- | dm1=&epsilon; | de1=1.49 | pn1=89 | ps1=[[yttrium|Y]]
+ | dm1=ε | de1=1.49 | pn1=89 | ps1=[[yttrium|Y]]
- | dm2=[[beta decay|&beta;<sup>-</sup>]] | de2=0.909D | pn2= | ps2=- }}
+ | dm2=[[beta decay|β<sup>-</sup>]] | de2=0.909D | pn2= | ps2=- }}
 {{Elementbox_isotopes_decay | mn=90 | sym=Sr
  | na=[[synthetic radioisotope|syn]] | hl=28.90 [[year|y]]
- | dm=&beta;<sup>-</sup> | de=0.546 | pn=90 | ps=[[yttrium|Y]] }}
+ | dm=β<sup>-</sup> | de=0.546 | pn=90 | ps=[[yttrium|Y]] }}
 {{Elementbox_isotopes_end}}
 {{Elementbox_footer | color1=#ffdead | color2=black }}