In the Geiger Marsden experiment, alpha particles are scattered by gold nuclei. The experimental results indicate that most alpha particles are:

scattered back along the original direction

Ag-102, Ag-103 and Ag-104 are three isotopes of the element silver. Which one of the following is a true statement about the nuclei of these isotopes?

All have the same number of protons.

All have the same number of nucleons.

All have the same number of neutrons.

The existence of isotopes provides evidence for the presence of

neutrons in the nuclei of atoms.

electrons in atomic energy levels.

electrons in the nuclei of atoms.

protons in the nuclei of atoms.

Which of the following provides evidence for the existence of atomic energy levels?

Discrete energies of gamma radiation

Which of the following identifies the significant interaction(s) between nucleons inside the nucleus?

Gravitational, nuclear and Coulomb

The number of nucleons in a nucleus is the number of

protons plus neutrons in the nucleus.

The atomic line spectra of elements provides evidence for the existence of

quantized energy states within atoms

quantized energy states within nuclei

7.1 Atomic Physics

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1/11 Questions

In the Geiger Marsden experiment, alpha particles are scattered by gold nuclei. The experimental results indicate that most alpha particles are:
- Scattered only at small angles
- Scattered only at large angles
- Absorbed in the target
- Scattered back along the original direction

About This Quiz

Explore key experiments and concepts in atomic physics with this quiz. Topics include the Geiger Marsden experiment's insights on atomic structure, the role of neutrons in isotopes, and evidence of atomic energy levels through line absorption spectra. Ideal for students enhancing their understanding of atomic theory.

2.

In the Geiger Marsden experiment, nearly all α particles went through without deviating. What may be concluded from this observation?
3.

In the Geiger Marsden experiment, occasionally an alpha particle bounced back off the gold leaf. What may be concluded from this observation?
4.

Ag-102, Ag-103 and Ag-104 are three isotopes of the element silver. Which one of the following is a true statement about the nuclei of these isotopes?
- All have the same mass.
- All have the same number of nucleons.
- All have the same number of neutrons.
- All have the same number of protons.
Correct Answer

A. All have the same number of protons.

Explanation

The statement "All have the same number of protons" is true because isotopes of an element have the same number of protons, which determines the element's identity. The difference between isotopes lies in the number of neutrons, which can vary. Therefore, Ag-102, Ag-103, and Ag-104 all have the same number of protons, but different numbers of neutrons, resulting in different atomic masses.

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5.

The existence of isotopes provides evidence for the presence of
- Electrons in atomic energy levels.
- Electrons in the nuclei of atoms.
- Neutrons in the nuclei of atoms.
- Protons in the nuclei of atoms.
Correct Answer

A. Neutrons in the nuclei of atoms.

Explanation

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons. The fact that isotopes exist and have different masses provides evidence for the presence of neutrons in the nuclei of atoms. If all atoms had the same number of protons and electrons, there would be no variation in atomic mass. Therefore, the existence of isotopes supports the idea that there are particles other than protons and electrons in the nucleus, which are the neutrons.

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6.

Which of the following provides evidence for the existence of atomic energy levels?
- Alpha-particle scattering
- Continuous emission spectra
- Discrete energies of gamma radiation
- Line absorption spectra
Correct Answer

A. Line absorption spectra

Explanation

Line absorption spectra provide evidence for the existence of atomic energy levels. When atoms absorb light, they do so at specific wavelengths corresponding to the energy differences between different energy levels within the atom. This results in dark lines or gaps in the continuous spectrum, known as absorption lines. These absorption lines provide direct evidence for the existence of discrete energy levels within atoms, confirming the theory of atomic energy levels.

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7.

Which of the following identifies the significant interaction(s) between nucleons inside the nucleus?
- Nuclear only
- Coulomb only
- Weak Nuclear and Coulomb
- Gravitational, nuclear and Coulomb
- Strong Nuclear and Coulomb
Correct Answer

A. Strong Nuclear and Coulomb

Explanation

The strong nuclear force and the Coulomb force are the two significant interactions between nucleons inside the nucleus. The strong nuclear force is responsible for holding the nucleus together by overcoming the electrostatic repulsion between protons. It is a short-range force that acts only within the nucleus. The Coulomb force, on the other hand, is the electrostatic force of attraction or repulsion between charged particles. It acts between protons and between protons and neutrons in the nucleus. Both of these forces play a crucial role in determining the stability and properties of the nucleus.

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1
8.

The Geiger-Marsden alpha particle scattering experiment provides evidence for the existence of
- Atomic nuclei.
- Neutrons.
- Protons.
- Nuclear energy levels.
Correct Answer

A. Atomic nuclei.

Explanation

The Geiger-Marsden alpha particle scattering experiment involved firing alpha particles at a thin sheet of gold foil. According to the plum pudding model of the atom, the positive charge in an atom was thought to be spread out evenly throughout the atom. However, the experiment showed that some alpha particles were deflected at large angles or even bounced back, which indicated the presence of a dense, positively charged center in the atom. This center was later identified as the atomic nucleus, providing evidence for the existence of atomic nuclei.

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9.

The number of nucleons in a nucleus is the number of
- Particles in the nucleus.
- Neutrons in the nucleus.
- Protons in the nucleus.
- Protons plus neutrons in the nucleus.
Correct Answer

A. Protons plus neutrons in the nucleus.

Explanation

The number of nucleons in a nucleus refers to the total number of particles present in the nucleus. Nucleons include both protons and neutrons, so the correct answer is protons plus neutrons in the nucleus. This is because protons and neutrons are the two types of particles found in the nucleus, and their combined count gives the total number of nucleons.

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1
10.

The atomic line spectra of elements provides evidence for the existence of
- Protons
- Electrons
- Neutrons
- Quantized energy states within nuclei
- Quantized energy states within atoms
Correct Answer

A. Quantized energy states within atoms

Explanation

The correct answer is quantized energy states within atoms. The atomic line spectra of elements refers to the specific wavelengths of light emitted or absorbed by atoms when they transition between different energy levels. This phenomenon can only be explained if the energy levels within atoms are quantized, meaning they can only have specific discrete values. This supports the concept of quantized energy states within atoms. The other options, such as protons, electrons, neutrons, and quantized energy states within nuclei, are not directly related to the atomic line spectra.

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1
11.

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Quiz Edited by
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Feb 20, 2013

Quiz Created by
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7.1 Atomic Physics

In the Geiger Marsden experiment, alpha particles are scattered by gold nuclei. The experimental results indicate that most alpha particles are:

Quiz Preview

In the Geiger Marsden experiment, nearly all α particles went through without deviating. What may be concluded from this observation?

In the Geiger Marsden experiment, occasionally an alpha particle bounced back off the gold leaf. What may be concluded from this observation?