ICSE Class 9 Chemistry Atomic Structure and Chemical Bonding
Model of An AtomCredit for the discovery of electron goes to J.J.Thomson, proton to E.Goldstein and neutrons to J. Chadwick.
J.J. Thomson proposed that electrons are embedded in a positive sphere.
The mass of positively charged proton and neutral neutron is one unit each.
The mass of negatively charged electron is about 1/1840 times the mass of a proton.
Parameters of An AtomParameters of an atom
Distribution of Electrons in OrbitsDistribution of Electrons in Orbits
Chemical Activity of AtomsChemical Activity of Atoms
Redox ReactionsRedox reactions
Electrovalent BondingElectrovalent bonding
Covalent BondingCovalent bonding