General chemistry

General chemistry

Contributors in General chemistry

General chemistry

Matter in a form that has low density, is easily compressible and expandable, and expands spontaneously when placed in a larger container. Molecules in a gas move freely and are relatively far apart. ...

Periodic law

Chemistry; General chemistry

The periodic law states that physical and chemical properties of the elements recur in a regular way when the elements are arranged in order of increasing atomic number.

Volume percentage

Chemistry; General chemistry

Volume percentages express the concentration of a component in a mixture or an element in a compound. For example, 95% ethanol by volume contains 95 mL of ethanol in 100 mL of solution (NOT in 100 mL ...

Corrosion

Chemistry; General chemistry

Corrosion is a reaction that involves action of an oxidising agent on a metal. The oxidising agent is often oxygen dissolved in water. See How Iron Rusts for examples.

Lanthanide

Chemistry; General chemistry

Elements 57-70 are called lanthanides. Electrons added during the Aufbau construction of lanthanide atoms go into the 4f subshell.

Siemens

Chemistry; General chemistry

The SI unit of electrical conductance . A material has a conductance of one siemens if one ampere of electric current can pass through it per volt of electric potential .

Aufbau principle

Chemistry; General chemistry

An approximate procedure for writing the ground state electronic configuration of atoms. The configuration of an atom is obtained by inserting one electron into the configuration of the atom ...