BioSite forsiden

Indhold i box-in-a-box-4b

The Periodic Table of the Elements

Bookmark and Share

Udskriv

Synonyms: Periodic chart

The Periodic Table of the Elements is a systematic arrangement of the elements according to their atomic number and chemical properties. The atomic number indicates the number of protons in the nuclei. Atoms in the same group share a number of chemical similarities, e.g. the atoms in group one - the alkali metals - all has a single electron in the outer shell. These atoms reacts easily with atoms from the 17'th group - the halogens - and creates salts like NaCl (sodium chloride) and KBr (potassium bromide). In the 18'th group the noble gasses are found, these gases are nonreactive to such a degree that they seldom reacts with other atoms. As a consequence they exists as monoatomic gases.

The Periodic Table of the Elements

Different versions of The Periodic System as pdf-files:

Table 1

Table 2

Table 3

Indhold i box-in-a-box-5

www.BioSite.dk 13/10,09; 24/11,09

Indhold i box-in-a-box-6b

Politik til beskyttelse af personlige oplysninger

Box 10
Box 11
Box 12
Box 13