Potassium

Potassium (K) is a chemical element of the periodic table, located in group 1 and period 4, having the atomic number 19. It is a soft, silvery white alkali metal whose name comes from the English word “potash”. In nature, potassium only exists in ionic salts. Naturally occurring potassium is made of three isotopes, of … Read more

Sodium

Sodium (Na) is a chemical element of the periodic table, located in group 1 and period 3, and has the atomic number 11. It is a soft, silvery-white alkali metal whose name comes from the English word “soda”. Sodium is the sixth most common element on Earth, making about 2.6 percent of the planet’s crust. … Read more

Lithium

The information on this page is ✔ fact-checked. Lithium, having the symbol Li and atomic number 3, is a chemical element. It is a soft, silvery-white alkali metal that is located in group 1 of the periodic table, with helium and beryllium as its neighbors. Lithium is the lightest solid element and has a density … Read more

Periodic table

The information on this page is ✔ fact-checked. The periodic table, commonly referred to as the periodic table of elements, presents all chemical elements in a tabular form. It consists of 118 elements arranged by ascending atomic numbers, with the table comprising the s-block, p-block, d-block, and f-block. Its eighteen vertical columns are known as … Read more

Combined gas law

The information on this page is ✔ fact-checked. The combined gas law describes the relationship between the pressure (P), volume (V), and temperature (T) of a gas. It is derived by combining Boyle’s law, Charles’s law, and Gay-Lussac’s law into a single expression. The combined gas law states that the ratio of the initial pressure, … Read more

Henry’s law

The information on this page is ✔ fact-checked. Henry’s law describes the relationship between the solubility of a gas in a liquid and the pressure of that gas above the liquid. It states that at a given temperature, the amount of gas dissolved in a liquid is directly proportional to the partial pressure of that … Read more

Dalton’s law

The information on this page is ✔ fact-checked. Dalton’s law, also known as Dalton’s law of partial pressures, states that in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of individual gases. This law is based on the concept that each gas in a mixture … Read more

Ideal gas law

The information on this page is ✔ fact-checked. The ideal gas law describes the relationship between pressure (P), volume (V), temperature (T), and the number of gas molecules (n). It states that, for an ideal gas, changes in pressure, volume, temperature, and the number of gas molecules are interrelated. This law can simply be understood … Read more

Avogadro’s law

The information on this page is ✔ fact-checked. Avogadro’s law states that the volume and amount of gas are directly proportional at constant temperature and pressure. This law, attributed to the Italian scientist Amedeo Avogadro, asserts that “equal volumes of gases at the same temperature and pressure contain equal numbers of molecules.” It illustrates the … Read more