Chemistry Chapter 2 Hw 1 Try 3

8.35x10^`6 s^-1

A photon has an energy of 5.53 × 10¯ 17 J. What is its frequency in s¯ 1?

Transition Elements

An element with the electron configuration [Xe] 6 s 24 f 145 d 7 would belong to which class on the periodic table?

False

Bohr's model correctly describes the hydrogen atom and other small atoms.

15.508

Calculate the frequency in Hz of a photon that will cause excitation of an hydrogen atom from the state where n = 1 to the state where n = 7? Once you have that value, determine its log (base 10) and enter your answer with three decimal places. Do not enter units with your answer.

valence

The __________ electrons are in the outermost principal quantum level of an atom.

diffraction

The interference pattern seen when light passes through narrow, closely spaced slits, is due to

True

The magnetic quantum number is related to the orientation of the orbital in space relative to the other orbitals in the atom.

1

The number of unpaired electrons in the outer subshell of a Cl atom is

4.74E14

What is the frequency (s-1) of a type of laser light with a wavelength of 632.8 nm? Enter your answer in exponential format (1.23E4) with two decimal places and no units.

Ultraviolet Light

When ignited, a uranium compound burns with a green flame. The wavelength of the light given off by this flame is greater than that of

Bi

Which of the following electron configurations is correct? A. Ga: [Kr]4s23d104p1 B. Ca: [Ar]4s13d10 C. Br: [Kr]4s23d104p7 D. Mo: [Kr]5s24d5 E. Bi: [Xe]6s24f145d106p3

A 2p orbital is more penetrating than a 2s; i.e., it has a higher electron density near the nucleus and inside the charge cloud of a 1s orbital

Which of the following statements is false? A. The spin quantum number of an electron must be either + or -. B. The electron density at a point is proportional to ψ2 at that point. C. A 2p orbital is more penetrating than a 2s; i.e., it has a higher electron density near the nucleus and inside the charge cloud of a 1s orbital. D. An orbital can accommodate at most two electrons. E. In the usual order of filling, the 6s orbital is filled before the 4f orbital.