Page 95 - Chemistry ICSE Class IX

CHAPTER 4

Atomic Structure and

Chemical Bonding

TOPICS COVERED

ƒ Electrical nature of matter: ƒ The structure of atom ƒ Chemical reactivity and
Discharge tube experiments ƒ Rutherford’s nuclear model electronic configuration
ƒ Cathode rays of atom ƒ Octet rule
ƒ J. J. Thomson’s experiment ƒ Böhr’s model of atom ƒ Electrovalent Bond
and the discovery of electron ƒ Nuclear composition: ƒ Structures of some
ƒ Positive rays (anode rays or The atomic nucleus electrovalent compounds
canal rays) ƒ Valence electrons and valency ƒ Covalent Bond
ƒ The proton ƒ Isotopes ƒ Structures of some covalent
ƒ The neutron ƒ Fractional atomic masses compounds and molecules

Highlight the past and TOPIC-WISE Provide the first step in
BOXED FEATURES future developments in ASSIGNMENTS testing your learning
science

Help develop your Enable you to measure
ILLUSTRATIVE understanding for the LET US ANSWER SOME
QUESTIONS topics studied MORE QUESTIONS your conceptual
understanding

Helps you to reflect back
LET US SAY IT AGAIN on what you have learned