Atomic Number
28
Element 28
Nickel (Ni)
Nickel is a chemical element with symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge.
Atomic Mass
58.693 u
Category
Transition Metal
Period
4
Group
Group 10: nickel group
Phase
solid
Density
8.908 g/cm3
Electron Shells
2, 8, 16, 2
Atomic Structure
Protons: 28. Electrons: 28. Neutrons: Varies by isotope.
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁸
Why Nickel Matters
Nickel helps connect atomic number 28, transition metal behavior, period 4 trends, and electron shell structure. Its solid phase, atomic mass of 58.693 u, and electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁸ make it useful for comparing bonding patterns across the periodic table.
Discovery and Occurrence
Nickel was discovered 1751 by Axel Fredrik Cronstedt. Nickel is a chemical element with symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge.
Safety and Handling Context
Nickel is presented here for learning and comparison. Pure elements and laboratory compounds can have hazards that depend on dose, form, and setting.
Related Elements
Frequently Asked Questions
- What is the atomic number of Nickel?
- Nickel has atomic number 28, which means a neutral atom has 28 protons and 28 electrons.
- What is the chemical symbol for Nickel?
- The chemical symbol for Nickel is Ni.
- What category is Nickel in?
- Nickel is classified as a transition metal and sits in period 4 of the periodic table.
Explore Nickel in 3D
Use the interactive table above to rotate atomic models, compare periodic trends, and move from Nickel to neighboring elements without losing your place.