(19). Which of the following quantum numbers describes the shape of an orbital?
ID: 550614 • Letter: #
Question
(19). Which of the following quantum numbers describes the shape of an orbital? (A). principal quantum number (B). magnetic quantum number (C). angular momentum quantum number (D). spin quantum number (E). Schrodinger quantum number (20). Electron configuration of Li* is (A). 1s2 (B). 1s2 2s 2p6 3s23p6 (C). 1s22s (D). 1s2 2s (E). 1s2s2p (21). Which of the following statement is true? (A). Energy increases as the wavelength decreases. (B). Energy increases as the frequency increases. (C). Frequency increases as the wavelength decreases. (D). All of the statements are true. (22). Consider the following process: N + 3e N3- Radius of N3 is greater than the radius of N. (A). True (B). FalseExplanation / Answer
19. Answer is c angular momentum quantum number. It is denoted by symbol 'l'. It is also called azimuthal quantum number. There are s p d f orbitals. Ex S orbital is pherical shape, P orbital is dumbbell shaped, d is double dumbbell shape etc.
The value of l decided by principal quantum number, i.e. 0 to n-1.
20.The answer is A. Li+ ion is containing only two electron. The atomic number of neutral Lithium atom is 3. Since one electron is less in Li+ ion. Therefore two electrons are present in 1S orbital.
21. D. All of the statements are true.
22.A. True. Nitrogen is 0.070nm.
Nitride ion is 0.171nm.
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