-21 This energy diagram shows the allowed energy levels of an electron in a certain atom. (Note: the SI prefix 'zepto' means 10 any SI prefix in the ALEKS Data tab.) 1400 1200- 1000- energy (z)) 800- 600 400- 200 0 -C -B -A Use this diagram to complete the table below. What is the energy of the electron in the ground state? What is the energy of the electron in the first excited state? If the electron makes the transition shown by the red arrow, from B to A, will a photon be absorbed or emitted? Calculate the wavelength of the photon that would be absorbed or emitted. Round your answer to 3 significant digits. O absorbed O emitted 0 nm X Ś You can find the meaning of

Why was Bohr's theory for the hydrogen atom initially accepted, and why was it ultimately discarded?

Explain electron from a quantum mechanical perspective, including a discussion of atomic radii, probabilities, and orbitals.

How are the Bohr model and the quantum mechanical model of the hydrogen atom similar? How are they different?

How many electrons in an atom can have the following quantum designation? (a) 1s (b) 4d, m l =0(c) n=5,l=2

Give electron configurations according to the Bohr model for each of the following elements. Indicate which of these elements you expect to be the most reactive and the least reactive. a. He b. Al c. Be d. Ne e. O

1. Which of the following is not a correct representation of an orbital? 3s 3p 3d 3f

How does probability fit into the description of the atom?

Investigating Energy Levels Consider the hypothetical atom X that has one electron like the H atom but has different energy levels. The energies of an electron in an X atom are described by the equation E=RHn3 where RH is the same as for hydrogen (2.179 1018 J). Answer the following questions, without calculating energy values. a How would the ground-state energy levels of X and H compare? b Would the energy of an electron in the n = 2 level of H be higher or lower than that of an electron in the n = 2 level of X? Explain your answer. c How do the spacings of the energy levels of X and H compare? d Which would involve the emission of a higher frequency of light, the transition of an electron in an H atom from the n = 5 to the n = 3 level or a similar transition in an X atom? e Which atom, X or H, would require more energy to completely remove its electron? f A photon corresponding to a particular frequency of blue light produces a transition from the n = 2 to the n = 5 level of a hydrogen atom. Could this photon produce the same transition (n = 12 to n = 5) in an atom of X? Explain.

Which among the following are not quantized? a number of plastic bags in a box; b cars passing through a toll plaza in a day; c birds in an aviary; d flow of a river in m3/hr; e percentage of salt in a solution.