Samarium
LanthanideAtomic Number: 62 • Atomic Mass: 150.3600 u • Period: 6 • Group: 101
Atomic Structure
Electron Configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f⁶The electron configuration represents the distribution of electrons in atomic orbitals, showing how they are arranged in energy levels and subshells.
Subatomic Particles
62
Positive charge
88
No charge
62
Negative charge
Atomic Number & Mass Number
The atomic number (62) represents the number of protons in the nucleus.
The mass number (150) is the sum of protons and neutrons in the nucleus.
Isotopes
Isotopes are variants of an element that have the same number of protons but different numbers of neutrons.
Sm-144
Sm-147
Sm-148
Sm-149
Sm-150
Sm-152
Sm-154
Stability & Half-Life
Half-Life Information
Some isotopes are stable, Sm-147 has half-life of 106 billion years
Half-life is the time required for half of the atoms of a radioactive isotope to decay.
Periodic Table Location
Period: 6
Group: 101
Category: Lanthanide
The period indicates the main energy level, while the group suggests similar chemical properties.