12. The possible value(s) of the magnetic quantum number,m, for a af electron is

Question

12. The possible value(s) of the magnetic quantum number,m, for a af electron is (are) 0, 1. 2, 3 1, 2, 3, 4 C. 13) Green light has a wavelength of 510 nm. What is the wavelength in m? A) 5.1 × 10-9 m B) 5.1 m C) 510 m D) 5.1 × 10-7 m E) 5.1 x 10-11 m 14) Atomic emission spectra are due to electrons being removed from an atom. in an atom rising from one energy level to a higher one. C) in an atom dropping from one energy level to a lower one. D) being added to an atom. E) changing state from solid to liquid. have the designation . 15) The principal quantum numbers C) , , D) k, m, s... E) H, Li, H... el electrons 16) An s orbital can hold A) 6 B) 10 C) 18 E) 8 electrons. 17) Any p sublevel can hold up to B) 8 C) 18 D) 2 E) 10

Explanation / Answer

Answer:

12) The magnetic quantum numbers ml of a 4f orbital are-3,-2,-1,0,1,2,3.

This is because l=3 for f orbital and ml values are - l to + l including 0.

So answer (d) is correct.

13) Given wavelength =510 nm, but we know that 1 nm=1x10^-9 m,

So wavelength=510x10^-9 m=5.10x10^-7 m.

So option (D) is correct.

14) The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state.  

So answer is (C).

15) The principal quantum number (n) can be represented as 1,2,3,4,5-------. (1s,2p,3d--)

So option (B) is correct.

16) An s-orbital can hold only 2 electrons. Correct answer is (D).

17) The p-orbital can hold 6 electrons, because it has three subshells. Each subshell accommodate 2 electrons.

Option (A) is correct.

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