32) Electrons filling up the orbitals from low to high is known as (the) A) Aufbau principle. C) Heisenberg uncertainty principle. B) Hund's rule. D) Pauli exclusion principle. 33) Which statement is TRUE about kinetic molecular theory? A) A single particle does not move in a straight line. B) The size of the particle is large compared to the volume. C) The average kinetic energy of a particle is not proportional to the temperature. D) The collisions of particles with one another is completely elastic.

1. How can you describe the energy states of an electron? (explain in terms of quantum numbers

A.) What is the grounds the electron configuration of 15p. B.) Show the orbital diagram. C.) Write the four quantum numbers associated with the last electron. D.) Is it paramagnetic or diamagnetic?

Consider the three electromagnetic waves shown in the image. Which wave has the longest wavelength? A Ов Which wave has the greatest frequency? B B Which wave has the greatest energy? B

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A) Based on the photoelectron spectrum, identify the unknown element and write its electron configuration. B) Consider the element in the periodic table that is directly to the right of the element identified in part (a). Would the 1s peak of this element appear to the left of, right of, or in the same position as the 1s peak of the element in part (a)? Explain your reasoning.

18. (a) What did Ernest Rutherford observe during his experiments? (b) What did Niels Bohr observe during his experiments? (c) How did the work of each scientist contribute to the development of the planetary model of the atom? Explain your ideas in at least four (4) sentences.

of the velocity in (c) to the speed of light? 2. In 1913 Neils Bohr proposed a model for the hydrogen, now known as the Bohr atom, that explained the emission spectrum of the hydrogen atom as well as one-electron ions like Het. The model permits the electron to orbit the nucleus by a set of discrete orbits where each orbit is associated with an integer value n, known as the principal quantum number. Depending upon the orbital occupied by the electron, the energy of the hydrogen atom (or one-electron ions) can only assume the following discrete values 1terd 30 tF aconstant En n2 prineiple 2 S1 where RH 2.18x10-18 J is the Rydberg constant and Z is the number of protons in the nucleus.(a) List the energies of the hydrogen atom for the first three orbits (n-1, 2, and 3).*(b) Compute the energy absorbed by the hydrogen atom when the electron is excited from the lowest orbit (n 1) to the third lowest orbit (n 3). (c) Calculate the frequency v of the photon E = y absorbed by the hydrogen…

22. Using the Bohr model, determine the energy of an electron with n = 6 in a hydrogen atom.

When electrons pass through a sheet of aluminum, a pattern of high and low intensity is observed. What claim does this experimental evidence support? Electrons are particles. Light is a particle. Light is a wave. Electrons are waves.