Answers are given in the end-
Explain-
1 Emission Atomic spectrum
2 Absorption spectrum
3 Black body
4.Planks theory of radiation
5.Photoelectric effect
6.Heisenberg,s uncertainty principle
7.De Broglie,s Statement
8. Aufbau,s Principles
9. Pauli,s Exclusion law
10. Hund,s rule of maximum multiplicity
Answers-
1.The pattern of (EMR) electromagnetic radiation obtained when radiation of heated element is passed through prism.
2.When electromagnetic radiation is passed through the compound and than through prism , some of radiation is absorbed which is missed in spectrum.
3.The body which absorbs and evolve all kind of radiations is called black body.
4.The EMR absorbed or emitted discontinuously in the form of small packets of energy is called quantum or photon.
5.The emission of electrons from metal surface having low ionization energy when radiation of suitable frequency is made to fall on surface of metal is called photoelectric effect.
6. It is impossible to measure exact position and momentum ( velocity) of electron simultaneously.
7. Similar to duel nature of (EMR) electromagnetic radiation , electron should have dual nature.
8.When electrons are filled in orbitals, filling of electrons are started from lowest energy level.
9. No any two electrons in an orbital can have all the four quantum numbers same means an orbital can not accommodate more than two electrons.
10. Pairing of electrons will not occur till all the orbitals of same subshell are singly occupied.
CHEMIGOD 