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Renium - Wikipedia Indonesia, ensiklopedia bebas berbahasa Indonesia

Renium

Dari Wikipedia Indonesia, ensiklopedia bebas berbahasa Indonesia.

75 tungstenrheniumosmium
Tc

Re

Bh
Keterangan Umum Unsur
Nama, Lambang, Nomor atom rhenium, Re, 75
Seri kimia transition metals
Golongan, Periode, Blok 7, 6, d
Penampilan grayish white
Massa atom 186.207(1) g/mol
Konfigurasi elektron [Xe] 4f14 5d5 6s2
Jumlah elektron tiap kulit 2, 8, 18, 32, 13, 2
Ciri-ciri fisik
Fase solid
Densitas (sekitar suhu kamar) 21.02 g/cm³
Densitas cair pada titik lebur 18.9 g/cm³
Titik lebur 3459 K
(3186 °C, 5767 °F)
Titik didih 5869 K
(5596 °C, 10105 °F)
Kalor peleburan 60.43 kJ/mol
Kalor penguapan 704 kJ/mol
Kapasitas kalor (25 °C) 25.48 J/(mol·K)
Tekanan uap
P/Pa 1 10 100 1 k 10 k 100 k
pada T/K 3303 3614 4009 4500 5127 5954
Ciri-ciri atom
Struktur kristal hexagonal
Bilangan oksidasi 6, 4, 2, −2
(mildly acidic oxide)
Elektronegativitas 1.9 (skala Pauling)
Ionization energies
(more)
1st: 760 kJ/mol
2nd: 1260 kJ/mol
3rd: 2510 kJ/mol
Jari-jari atom 135 pm
Jari-jari atom (terhitung) 188 pm
Jari-jari kovalen 159 pm
Lain-lain
Sifat magnetik  ?
Resistivitas listrik (20 °C) 193 nΩ·m
Konduktivitas termal (300 K) 48.0 W/(m·K)
Ekspansi termal (25 °C) 6.2 µm/(m·K)
Kecepatan suara (pada wujud kawat) (20 °C) 4700 m/s
Modulus Young 463 GPa
Modulus rigiditas 178 GPa
Modulus ruah 370 GPa
Nisbah Poisson 0.30
Skala kekerasan Mohs 7.0
Kekerasan Vickers 2450 MPa
Kekerasan Brinell 1320 MPa
Nomor CAS 7440-15-5
Isotop
iso NA waktu paruh DM DE (MeV) DP
185Re 37.4% Re stabil dengan 110 neutron
187Re 62.6% 4.35×1010 y α 1.653 183Ta
β- 0.003 187Os
Referensi

Rhenium adalah suatu unsur kimia dalam tabel periodik yang memiliki lambang Re dan nomor atom 75.

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