Atomic Structure Mastery Quiz

What does the atomic number of an element represent?

• The number of protons in the nucleus

• The number of neutrons in the nucleus

• The total number of protons and neutrons in the nucleus

• The total number of protons and electrons in an atom

Which of the following best describes the mass number of an atom?

• The number of protons it contains

• The number of electrons it contains

• The total number of protons and neutrons in the nucleus

• The total mass of the electrons in the atom

Which of the following statements is true about isotopes?

• Isotopes have the same number of protons but different numbers of electrons.

• Isotopes have the same number of neutrons but different numbers of protons.

• Isotopes have the same number of protons but different numbers of neutrons.

• Isotopes have the same number of electrons but different numbers of protons.

An ion with a positive charge is known as:

• An anion

• A cation

• A neutron

• An isotope

According to the Bohr model, electrons:

• Move in random paths around the nucleus

• Are distributed in a cloud around the nucleus

• Move in fixed orbits around the nucleus

• Are attached directly to the nucleus

Which subatomic particle is negatively charged?

• Proton

• Neutron

• Electron

• Positron

The presence of which subatomic particle makes an atom neutral?

• The same number of protons and neutrons

• The same number of neutrons and electrons

• The same number of protons and electrons

• An equal number of protons, neutrons, and electrons

What is the main difference between the Bohr model and the quantum mechanical model of the atom?

• The Bohr model describes electrons in fixed orbits, while the quantum mechanical model describes them in terms of probabilities.

• The Bohr model accurately describes all elements, while the quantum mechanical model only describes hydrogen.

• The Bohr model uses quantum numbers, while the quantum mechanical model does not.

• The Bohr model considers the nucleus to be made of quarks, while the quantum mechanical model does not.

Which of the following is not a subatomic particle?

• Proton

• Neutron

• Electron

• Molecule