Models of the Atom – Flashcards

What is the concentration of positive charge and mass in Rutherford's atomic model called? a. alpha particle c. proton b. neutron d. nucleus

Which of the following is not a feature of Bohr's model of the atom? a. Electrons move in circular orbits about the nucleus. b. Only certain electron orbits are allowed. c. Electrons emit radiation continuously while orbiting the nucleus. d. Electron jumps between energy levels account for discrete spectral lines.

Which statement about Rutherford's model of the atom is not correct? a. The model states that positive charge is unevenly distributed. b. The model depicts electrons orbiting the nucleus as planets orbit the sun. c. The model explains spectral lines. d. The model predicts that atoms are unstable.

When a high potential difference is applied to a low-pressure gas, what kind of spectrum will the gas emit? a. emission c. continuous b. absorption d. monochromatic

What causes the bright lines in the emission spectrum of an element to occur? a. Photons are absorbed when electrons jump from a higher-energy to a lower-energy state. b. Photons are emitted when electrons jump from a higher-energy to a lower-energy state. c. Photons are absorbed when electrons jump from a lower-energy to a higher-energy state. d. Photons are emitted when electrons jump from a lower-energy to a higher-energy state.

Use the figure shown above to determine how much energy a hydrogen atom with its electron in the E2 energy level must absorb for the electron to be removed from the atom. a. -0.378 eV c. 3.40 eV b. -3.40 eV d. 0.378 eV

Which of the following is not a weakness of the Rutherford model of the atom? a. The atom radiates energy continuously. b. The atom cannot produce spectral lines. c. The atom is unstable. d. The atom is mostly empty space.

What is the plum pudding model of an atom? a. Positively and negatively charged particles were randomly distributed in the atom. c. Positive charges were orbiting a negatively charged core. b. Positive and negative charges were concentrated at the center of the atom. d. None of the above.

In Rutherford's experiment, why did the nucleus repel alpha particles? a. electrostatic repulsion between the negatively charged nucleus and alpha particles b. electrostatic attraction between the negatively charged nucleus and alpha particles c. electrostatic repulsion between the positively charged nucleus and alpha particles d. electrostatic attraction between the positively charged nucleus and alpha particles

Which of the following statements is true about emission spectra? a. Emission spectra form dark lines on a continuous spectrum. b. The wavelengths of the spectrum are characteristic of the element emitting the light. c. The wavelengths of the spectrum are the same for all atomic gases. d. The wavelengths of the spectrum are the same for all elements.

Which of the following statements is true about emission spectra? a. Emission spectra form dark lines on a continuous spectrum. b. The wavelengths of the spectrum are characteristic of the element emitting the light. c. The wavelengths of the spectrum are the same for all atomic gases. d. The wavelengths of the spectrum are the same for all elements.

The figure shown above shows the energy levels for a hydrogen atom. What is the energy of the photon emitted when the electron in a hydrogen atom drops from energy level E5 to energy level E2? a. 2.86 eV c. 2.904 eV b. -2.904 eV d. -2.86 eV

What is the process in which an electron returns to a lower energy level and emits a photon? a. spontaneous emission c. line absorption b. line emission d. energy transition