What is Sm? Important knowledge about Sm.

1. Definition of Sm

Sm stands for Samarium, a chemical element in the lanthanide group with a proton number of 62.

1.1 Names
1.1.1 Common name: Samarium
1.1.2 English name: Samarium

1.2 Atomic mass: 150.36(2) u

1.3 Atomic weight: 62

1.3.1 Molecular structure: Samarium is a pure chemical element, which can exist in compound form.

1.4 Ion structure: Sm₂+, Sm₃+

2. Characteristics: Sm

2.1 Physical properties of Sm
State: Solid at room temperature
Color: Silver-white
Odor: None
PH level: None

2.2 Chemical properties of Sm
Samarium is very resistant to corrosion, only dissolves in acid, and can react with oxygen, chlorine, sulfur, and phosphorus when heated.

3. Common chemical equations involving Sm
   Samarium commonly participates in chemical reactions such as oxidation, reduction, and reactions with acids.

4. Preparation of Sm
   4.1 Laboratory preparation of Sm
   The preparation of Samarium in the laboratory is not feasible because this process requires special conditions and equipment.
   4.2 Industrial preparation of Sm
   In industry, Samarium is prepared from monazite ore through a series of complex processes including reactions with acids, separation, and reduction.