15. Which statement is not evidence for the wave-particle duality of light? Light travels at a constant speed in the vacuum of space. O Objects appear bent or broken when viewed through a glass of water. Electrons in specific locations around a nucleus emit specific wavelengths of light when they are excited. Electrons in gases can be excited with an electric current.

quizzes/982684 OneNote 101 Chem101 Tophat * USU Tutoring Scholarships :) Morgage Amer Why is light of at least a certain frequency needed to cause the photoelectric effect? O A certain quantity of energy is necessary to eject electrons from a metal A certain number of photons is necessary to eject electrons from a metal A certain temperature is necessary to eject electrons from a metal O A certain number of atoms is necessary to eject electrons from a metal O A certain speed of light is necessary to eject electrons from a metal

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.

9. An electron in the hydrogen atom relaxes to the n =2 orbit and 434 nm light is emitted. What was the initial orbit of the electron? A: 5 Me g ou counoe

A hydrogen atom in the n=4 state decays down to the n=2 state. What is the wavelength of light emitted? State your answer in nm. Note: wavelength is a positive number.

Identify the neutral element represented by this excited-state electron configuration. excited state: 1s²2s²2p63s²3p³ 4s¹ element symbol: Write the full ground-state electron configuration for that element. ground state: FEB 12 tv all A zoom

The work function (φ) for a metal is the amount of energy needed to eject an electron from the surface of the metal via the photoelectric effect. For nickel φ = 8.25 x 10-19J. Will a photon with a wavelength (λ) of 250.0 nm have enough energy to eject an electron from nickel?  If the speed of an electron in the n = 4 energy level of a hydrogen electron is 2.3 x 106 m/s, what is the de Broglie wavelength of this electron in nanometers (the mass of an electron is 9.10938 x 10-31 kg). Note: 1 ? = 1 ?? ∙?2 An F-15 Strike Eagle weighs in at roughly 32,000 kg fully loaded. If an F-15 Eagle is traveling at 3,017 kilometers per hour, what is the de Broglie wavelength associated with the aircraft at this speed in nanometers?

The electron in an (unbound) hydrogen atom (H(g)) is excited from the ground state to the n=3 state.Which of the following statements are true and which are false. 1. it takes less energy to ionize the electron from n=3 than it does from the ground state.2. The wavelength of the light emitted when the electron returns to the ground state from n=3 is the same as the wavelength of light absorbed to go from n=1 to n=3.3. the electron is farther from the nucleus on average in the n=3 state than in the ground state.4. The first excited state corresponds to n=3.5. The wavelength of light emitted when the electron drops from n=3 to n=2 is shorter than the wavelength of light emitted if the electron falls from n=3 to n=1.