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WorksheetsAtomic Structure- 2- Class IX
Total questions: 15
Worksheet time: 8mins
Distribution of Electrons
Atomic Number
Mass Number
Electronic configuration
Element having duplet state
Neon
Helium
Boron
Electronic configuration of Sodium
2,8,1
2,6
2,8,7
Maximum number of electrons in M shell of an atom
8
6
18
Number of protons in atom is called
Mass number
Atomic number
Number of neutrons
Isotopes have
Similar chemical properties
Similar physical properties
Same number of neutrons
Number of isotopes for Hydrogen atom
1
2
3
Isotopes have same
Number of electrons
Number of neutrons
mass number
8 electrons in the outermost orbit of an atom
Duplet state
Octet state
Ionic State
Example of electrovalent compound is
Water
Ammonia
Sodium Chloride
Covalent compound is formed by
Sharing of electrons
Transferring electron
Stable electronic configuration
Electrovalent compound is formed between
Non-metals
Metals
Metal and non-metal
Covalent compound is formed between
Metals
Non-metals
Metal and non-metal
An example of covalent molecule
Chlorine
Calcium oxide
Sodium
Electronic configuration of Oxygen
2,4
2,6
2,8,6
