Publicatie Laka-bibliotheek:
Understanding nuclear power
| Auteur | AECL |
| Datum | |
| Classificatie | 6.01.0.00/137 (ALGEMEEN) |
| Voorkant | 
|
Uit de publicatie:
Understanding Nuclear Power REACTOR PHYSICS The Atom The atom consists of a nucleus surrounded by electrons. The nucleus makes up most of the mass of the atom and consists of two kinds of small particles known as protons and neutrons. The mass of the neutron is approximately equal to that of the proton. The mass of the electron is very much less. Figure 1 shows the hydrogen atom which contains a positive proton in the nucleus and a negatively charged electron in orbit around the nucleus. Ordinary hydrogen does not have a neutron in the nucleus. It should be noted that the atom as a whole has no net charge. The negative charge of the electron is balanced by a corresponding positive proton charge. The neutron, as its name implies, has mass but no electrical charge. The diagram is not to scale as the electron orbit may be 10,000 times larger than the nucleus. Imagine the nucleus to be the size of a baseball, then the electrons would be specks 600 metres away. Isotopes Most elements in nature exist in more than one form, being different in the number of neutrons contained in the nucleus. These species of an element are called isotopes. They have the same number of protons and electrons and hence the same chemical properties (the arrangement and number of electrons control the chemistry).
Deze publicatie is alleen op papier bij Laka beschikbaar, niet als pdf.
Publicaties zijn te leen of informeer of we een kopie kunnen maken. Soms, als we tijd hebben, lukt dat tegen kostprijs van de kopieën.