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Indium - Wikipedia Indonesia, ensiklopedia bebas berbahasa Indonesia

Indium

Dari Wikipedia Indonesia, ensiklopedia bebas berbahasa Indonesia.

49 cadmiumindiumtin
Ga

In

Tl
Keterangan Umum Unsur
Nama, Lambang, Nomor atom indium, In, 49
Seri kimia poor metals
Golongan, Periode, Blok 13, 5, p
Penampilan silvery lustrous gray
Massa atom 114.818(3) g/mol
Konfigurasi elektron [Kr] 4d10 5s2 5p1
Jumlah elektron tiap kulit 2, 8, 18, 18, 3
Ciri-ciri fisik
Fase solid
Densitas (sekitar suhu kamar) 7.31 g/cm³
Densitas cair pada titik lebur 7.02 g/cm³
Titik lebur 429.75 K
(156.60 °C, 313.88 °F)
Titik didih 2345 K
(2072 °C, 3762 °F)
Kalor peleburan 3.281 kJ/mol
Kalor penguapan 231.8 kJ/mol
Kapasitas kalor (25 °C) 26.74 J/(mol·K)
Tekanan uap
P/Pa 1 10 100 1 k 10 k 100 k
pada T/K 1196 1325 1485 1690 1962 2340
Ciri-ciri atom
Struktur kristal tetragonal
Bilangan oksidasi 3
(amphoteric oxide)
Elektronegativitas 1.78 (skala Pauling)
Ionization energies
(more)
1st: 558.3 kJ/mol
2nd: 1820.7 kJ/mol
3rd: 2704 kJ/mol
Jari-jari atom 155 pm
Jari-jari atom (terhitung) 156 pm
Jari-jari kovalen 144 pm
Jari-jari Van der Waals 193 pm
Lain-lain
Sifat magnetik no data
Resistivitas listrik (20 °C) 83.7 nΩ·m
Konduktivitas termal (300 K) 81.8 W/(m·K)
Ekspansi termal (25 °C) 32.1 µm/(m·K)
Kecepatan suara (pada wujud kawat) (20 °C) 1215 m/s
Modulus Young 11 GPa
Skala kekerasan Mohs 1.2
Kekerasan Brinell 8.83 MPa
Nomor CAS 7440-74-6
Isotop
iso NA waktu paruh DM DE (MeV) DP
113In 4.3% In stabil dengan 64 neutron
115In 95.7% 4.41×1014y Beta- 0.495 115Sn
Referensi

Indium adalah suatu unsur kimia dalam tabel periodik yang memiliki lambang In dan nomor atom 49.

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