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28 cobalt ← nickel → copper - ↑ Ni ↓ Pd
Keterangan Umum Unsur
Nama, Lambang, Nomor atom	nickel, Ni, 28
Seri kimia	transition metals
Golongan, Periode, Blok	10, 4, d
Penampilan	lustrous, metallic
Massa atom	58.6934(2) g/mol
Konfigurasi elektron	[Ar] 3d8 4s2
Jumlah elektron tiap kulit	2, 8, 16, 2
Ciri-ciri fisik
Fase	solid
Massa jenis (sekitar suhu kamar)	8.908 g/cm³
Massa jenis cair pada titik lebur	7.81 g/cm³
Titik lebur	1728 K (1455 °C, 2651 °F)
Titik didih	3186 K (2913 °C, 5275 °F)
Kalor peleburan	17.48 kJ/mol
Kalor penguapan	377.5 kJ/mol
Kapasitas kalor	(25 °C) 26.07 J/(mol·K)
Tekanan uap P/Pa 1 10 100 1 k 10 k 100 k pada T/K 1783 1950 2154 2410 2741 3184
Ciri-ciri atom
Struktur kristal	cubic face centered
Bilangan oksidasi	2, 3 (mildly basic oxide)
Elektronegativitas	1.91 (skala Pauling)
Energi ionisasi (detil)	ke-1: 737.1 kJ/mol
	ke-2: 1753.0 kJ/mol
	ke-3: 3395 kJ/mol
Jari-jari atom	135 pm
Jari-jari atom (terhitung)	149 pm
Jari-jari kovalen	121 pm
Jari-jari Van der Waals	163 pm
Lain-lain
Sifat magnetik	ferromagnetic
Resistivitas listrik	(20 °C) 69.3 nΩ·m
Konduktivitas termal	(300 K) 90.9 W/(m·K)
Ekspansi termal	(25 °C) 13.4 µm/(m·K)
Kecepatan suara (pada wujud kawat)	(suhu kamar) 4900 m/s
Modulus Young	200 GPa
Modulus rigiditas	76 GPa
Modulus ruah	180 GPa
Nisbah Poisson	0.31
Skala kekerasan Mohs	4.0
Kekerasan Vickers	638 MPa
Kekerasan Brinell	700 MPa
Nomor CAS	7440-02-0
Isotop
iso NA waktu paruh DM DE (MeV) DP 56Ni syn 6.075 d ε - 56Co γ 0.158, 0.811 - 58Ni 68.077% Ni stabil dengan 30 neutron 59Ni syn 76000 y ε - 59Co 60Ni 26.233% Ni stabil dengan 32 neutron 61Ni 1.14% Ni stabil dengan 33 neutron 62Ni 3.634% Ni stabil dengan 34 neutron 63Ni syn 100.1 y β- 0.0669 63Cu 64Ni 0.926% Ni stabil dengan 36 neutron
Referensi

Nickel adalah unsur kimia metalik dalam tabel periodik yang memiliki simbol Ni dan nomor atom 28.

[sunting] Referensi

• Los Alamos National Laboratory – Nickel

[sunting] Pranala luar

• WebElements.com – Ni
• Article in Nature on nickel emitted by euro coins
• London Metal Exchange
• European Nickel plc
• IARC Monograph "Nickel and Nickel compounds"
• Tutorial - joining nickel alloys (pdf format)

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