Boyle's law is one of many gas laws and a special case of the ideal gas law. Boyle's law describes the inversely proportional relationship between the absolute pressure and volume of a gas,
In optics, the Beer–Lambert law, also known as Beer's law or the Lambert–Beer law or the Beer–Lambert–Bouguer law relates the absorption of light to the properties of
A lethal dose (LD) is an indication of the lethality of a given substance or type of radiation. Because resistance varies from one individual to another, the 'lethal dose' represents a dose
Avogadro's law is a gas law named after Amedeo Avogadro who, in 1811, hypothesized that two given samples of an ideal gas, at the same temperature, pressure and volume, contain the same numb
The European Commission number, or EC number, also known as EC-No and EC#, is the seven-digit code that is assigned to chemical substances that are commercially available within the European
A chemical nomenclature is a set of rules to generate systematic names for chemical compounds. IUPAC nomenclature is worldwide the most used chemical nomenclature. It is developed and kept u
CAS Registry Numbers are unique numerical identifiers assigned by the "Chemical Abstracts Service" to every chemical described in the open scientific literature and including eleme
A material safety data sheet (MSDS) is a form with data regarding the properties of a particular substance. An important component of product stewardship and workplace safety, it is intended
Chemistry is the study of matter and energy and the interactions between them. This is also the definition for physics, by the way. Chemistry and physics are specializations of physical scie
A solution results from combining two or more substances. Making a solution can produce either a physical or chemical change. You can tell them apart this way:
The original su
The changes that take place in substances may be categorized in two classes:
Physical Change - does not produce a new substance (e.g., phase changes, crushing a can).
These phases of matter can change from one to another. Remember the definitions of the following phase changes:
Melting - melting occurs when a substance changes from a solid
Each phase of matter has its own chemical and physical properties. The phases of matter you need to know are:
Solid - a solid has a definite shape and volume.
Liquid
Life on earth depends on the chemical element , which is present in every living thing. Carbon is so important, it forms the basis for two branches of chemistry, organic chemistry and bioche
Chemical bonds hold atoms together.
Ionic Bond - formed when an electron transfers from one atom to another.
Covalent Bond - formed when two atoms share one or more e
A chemical formula is a shorthand way of showing the elements contained in a molecule/compound and their ratio. For example, H2O, the chemical formula for water, shows that two atoms of hydr
The periodic table is a chart which organizes the chemical elements. The elements are categorized according to the following attributes:
Atomic Number - number of protons in t
An atom has an inner core called a nucleus, which is where the protons and neutrons are located. The electrons orbit around the outside of the nucleus.
An atom consists of three types of particles: protons, neutrons, and electrons. An atom does not need to have all three particles, but will always contain at least protons.
Dissolution is the process by which a solid solute enters a solution. In the pharmaceutical industry, it may be defined as the amount of drug substance that goes into solution per unit time
