Note: As “Ta” is not a specific chemical substance, I will take Hydrogen (H2) as an example. Definition of Hydrogen Hydrogen is a chemical element with the symbol H and atomic number 1. It is the lightest and most abundant chemical element in the universe, accounting for approximately 75% of the universe’s visible mass. 1.1. … Read more
HF is a colorless liquid, with an unpleasant odor, and very toxic. HF is known as hydrofluoric acid, the English name is Hydrofluoric Acid. HF consists of one hydrogen atom and one fluorine atom, the atomic mass of hydrogen is 1 and fluorine is 19, so the atomic mass of HF is 20. In chemistry, … Read more
1.1 Lu, or Lutetium, is the English name of the chemical element with the symbol Lu and atomic number 71. It is a transition metal belonging to the Lanthanide group in the periodic table. The atomic mass of Lutetium is 174.97 atomic mass units (u). Its molecular structure is very complex, and it does not … Read more
Definition of Yb Yb, also known as Ytterbium, is one of the chemical elements present in the periodic table, symbolized as Yb with the atomic number 70. Yb belongs to the lanthanide group and is a metal. The atomic mass of Yb is 173.04 amu. Ytterbium forms ions when it loses or gains electrons in … Read more
Definition of Tm Tm, or Thulium, is a chemical element with the symbol Tm and atomic number 69. It is a soft, silver-colored transition metal and belongs to the lanthanide group of the periodic table. The English name for Tm is Thulium. The atomic mass of Tm is 168.93421(2) u. The relative atomic mass of … Read more
Er is the chemical symbol for the element Erbium. Erbium is a chemical element in the lanthanide group on the periodic table, with the symbol Er and atomic number 68. 1.1 Names 1.1.1 Common name: Erbium 1.1.2 English name: Erbium 1.2 Atomic mass: 167.26 1.3 Atomic weight: 167.26 u 1.3.1 Molecular structure: Erbium is an … Read more
Example with the Chemical Substance Water (H2O): Definition of H2O: H2O, commonly known as water, is the most important chemical substance on Earth. This chemical comprises two hydrogen atoms (H) and one oxygen atom (O). The molecular weight of water is about 18 g/mol, calculated from the total mass of all atoms in a water … Read more
Definition of Dy Dy is the symbol for Dysprosium, a chemical element in the Lanthanide group of the periodic table. The atomic mass of Dysprosium is 162.500 atomic mass units and its atomic number is 66. The molecular structure of Dysprosium is simple with one Dysprosium atom forming the Dy molecule. Dysprosium does not form … Read more
Definition of Tb Tb is the symbol for the chemical element Terbium, an element in the lanthanide group of the periodic table. 1.1 Names of Tb 1.1.1 Common name: Terbium 1.1.2 English name: Terbium 1.2 The atomic number of Terbium is 65. 1.3 The atomic mass of Terbium is 158.92535(2) u. 1.4 Terbium can form … Read more
Definition of Gd Gd or Gadolinium is a chemical element belonging to the rare metal group in the periodic table, with the symbol Gd and atomic number 64. The English name for Gd is Gadolinium. Gd has an atomic mass of 157.25 and it belongs to the lanthanides. The ion structure of Gd is usually … Read more