FUNDAMENTAL PARTICLES An atom consists of the two parts : (a) Extremely small but dense central part called the nucleus. (b) Extra nuclear part. The size of nucleus is of the order 10–15 m and it contains positively charged protons and neutral particles called neutrons. These particles are collectively called nucleons. The charge and mass of these fundamental particles are given in the Table 1.1. TABLE 1.1. CHARGE AND MASS OF FUNDAMENTAL PARTICLES. Name of Charge Unit Mass (Kg) Name of the Discoverer the particle in coulomb Charge Electron –1.60 × 10–19 – 1 9.10 × 10–31 kg J.J. Thomson Proton + 1.60 × 10–19 + 1 1.672 × 10–27 kg E. Goldstein Neutron 0 0 1.674 × 10–27 kg Chadwic
Posted on: Fri, 27 Sep 2013 17:32:06 +0000
Trending Topics
Recently Viewed Topics
© 2015