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113 Nh Nihonium 286

Nihonium

UNKNOWN, PROBABLY TRANSITION METAL
Bohr Model: Electrons arranged in energy shells around the nucleus.

Nihonium is a chemical element with atomic number 113. It has a symbol Nh. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and is extremely radioactive; its most stable known isotope, nihonium-286, has a half-life of 20 seconds.

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Quick Facts

Atomic Number 113
Period 7
Group 13
Phase Solid
Appearance Unknown
About Unknown, Probably Transition Metals

Transition metals are elements with partially filled d-orbitals. They are hard, have high melting points, and often form colored compounds.

History

Discovered By RIKEN
Named By Unknown

Physical Properties

Atomic Mass 286
Density 16 g/L
Molar Heat N/A J/(mol·K)
Phase Transition (Melting & Boiling Points)

Nihonium melts at 700 K and boils at 1430 K.

Atomic Properties

Electron Config *[Rn] 5f14 6d10 7s2 7p1
Electronegativity N/A
Electron Affinity 66.6 kJ/mol
Ionization Energy N/A kJ/mol
Orbital Filling Diagram
This diagram visualizes electron configuration according to the Aufbau principle and Hund's rule. Boxes represent orbitals (s, p, d, f), while arrows indicate electrons with spin up or down. Electrons fill lower energy levels first and occupy orbitals singly before pairing.

Photograph

Image of Nihonium Source: Wikipedia

External Resources

Wikipedia PubChem Royal Society of Chemistry Periodic Videos (YouTube)

Study Guide

Atomic Number

The number of protons in the nucleus, which defines the element.

Atomic Mass

The average mass of an atom, including protons and neutrons.

Electronegativity

A measure of how strongly an atom attracts electrons in a bond.

Ionization Energy

The energy required to remove an electron from an atom.

Electron Config

The arrangement of electrons in the atom's energy shells.