1. kzaman 2. Mass of a Hydrogen atom = Mass 1 proton +mass of 1 electron = 1.67X10 -24+ 9.1x10 -28= 1.67x10 -24 g or equal to,0.000 000 000 000 000 000 000 0017 g electron…

1. JEE MANTRA MOLE CONCEPT 2. The concept of Atoms and Molecules • Relative atomic mass of an element .Average mass per atom of the natural isotopic composition…

A tom ic Structure Radioactivity H istory of discovery Becquerel D iscovery of radioactivity Curie Extraction of radium and polonium Rutherford Study the nature of , and…

AS Chemistry – Atomic structure and bonding Sub-atomic particles Protons – mass 1; charge +1 Electrons – mass 1/1840; charge –1 Neutrons – mass 1; charge 0 Atomic…

1. A rand M r 2. Let’s try counting the number of rice particles in a bucket of rice. Is it easy? 3. Relative atomic mass, A r Atoms arevery tiny particles .Atoms havevery…