Li, or Lithium, is a chemical element with the symbol Li and atomic number 3. Li is known as the strongest and lightest alkali metal, and is also the first alkali element in the periodic table. Lithium has an atomic mass of 6.94 and an atomic weight of 6.94 amu. Li molecules are usually composed … Read more
Definition of He He is the international symbol for Helium, a chemical element belonging to the main group 18, period 1 of the periodic table. The English name for Helium is “Helium”. The atomic mass of Helium is 4, and the atomic weight is 4.002602(2) u. A Helium molecule only contains one atom, which is … Read more
Definition of H Hydrogen (symbol H) is a chemical element with atomic number 1 on the periodic table. Hydrogen is the lightest chemical atom, accounting for the majority of the total number of atoms in the universe. 1.1 Names 1.1.1 Common name: Hydrogen 1.1.2 English name: Hydrogen 1.2. Atomic mass: 1.00794 u 1.3. Atomic weight: … Read more
The concept of “substance” in philosophy: In philosophy, “substance” is the foundation of reality, representing the essence of things, which “is” without needing anything else. Substance is often contrasted with “accident” or “attribute,” and it doesn’t change despite accidental variations. Substance in Chemistry: In chemistry, compounds are substances made up from at least two different … Read more