Atomic Structure and Properties Quiz

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Questions and Answers

What primarily contributes to the mass of an atom?

  • The surrounding shells
  • Electrons
  • Neutrons and protons (correct)
  • The nucleus itself

What defines the chemical identity of an atom?

  • Mass number
  • Atomic number (correct)
  • Electron configuration
  • Number of neutrons

What happens during ionization?

  • Electrons are gained by the atom
  • Electrons are removed from the atom (correct)
  • Protons are added to the nucleus
  • Neutrons are lost from the nucleus

Which of the following particles has a positive charge?

<p>Proton (C)</p> Signup and view all the answers

What is the Heisenberg Uncertainty Principle related to?

<p>Determining electron location precisely (A)</p> Signup and view all the answers

Which type of motion is not exhibited by electrons?

<p>Rectilinear motion (C)</p> Signup and view all the answers

In terms of nuclear spin, what is true about nuclei with even atomic and mass numbers?

<p>They typically have no net spin (B)</p> Signup and view all the answers

Isotopes of an atom differ in which aspect?

<p>Number of neutrons (A)</p> Signup and view all the answers

What primarily determines the chemical identity of an atom?

<p>Atomic number (C)</p> Signup and view all the answers

What happens to an atom when it loses electrons?

<p>It becomes an ion. (B)</p> Signup and view all the answers

Which of the following components of an atom carries a negative charge?

<p>Electrons (B)</p> Signup and view all the answers

What effect does Heisenberg's Uncertainty Principle have on the behavior of electrons?

<p>It suggests the position of electrons cannot be precisely known. (C)</p> Signup and view all the answers

What is the mass number of an atom equal to?

<p>Number of protons plus neutrons (D)</p> Signup and view all the answers

Which of the following motions does not occur within the atom?

<p>Proton trajectory (C)</p> Signup and view all the answers

What type of atom is created when there are more neutrons than protons?

<p>An isotope (C)</p> Signup and view all the answers

In MRI, what is the significance of having an even mass number in a nucleus?

<p>The nucleons spin in opposite directions, canceling each other out. (D)</p> Signup and view all the answers

What characterizes the atomic number?

<p>The sum of protons in the nucleus (A)</p> Signup and view all the answers

What is the main component of the atom's mass?

<p>Nucleons (A)</p> Signup and view all the answers

Which of the following statements about isotopes is true?

<p>Isotopes have the same number of protons but different numbers of neutrons. (B)</p> Signup and view all the answers

What occurs when an atom's stability is disrupted?

<p>It can create ions by losing or gaining electrons. (A)</p> Signup and view all the answers

Which of the following particles possesses no net charge?

<p>Neutron (A)</p> Signup and view all the answers

What aspect of atomic structure does MRI primarily rely on?

<p>The spins of nuclei (B)</p> Signup and view all the answers

How many types of motion exist in an atom according to the content?

<p>Three (B)</p> Signup and view all the answers

Why is an atom considered stable?

<p>When the number of electrons equals the number of protons. (B)</p> Signup and view all the answers

Flashcards

Atom

The fundamental building block of all matter.

Atomic Nucleus

The central core of an atom containing protons and neutrons.

Proton

A subatomic particle with a positive charge found in the nucleus.

Neutron

A subatomic particle with no charge found in the nucleus.

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Electron

A subatomic particle with a negative charge that orbits the nucleus.

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Atomic Number

The number of protons in an atom's nucleus. This determines the element's chemical identity.

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Mass Number

The sum of protons and neutrons in an atom's nucleus.

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Isotopes

Atoms of the same element with the same number of protons but differing numbers of neutrons.

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What is an atom?

The smallest unit of matter that retains the chemical properties of an element. Atoms consist of a central nucleus containing protons and neutrons, surrounded by orbiting electrons.

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What is the atomic number?

The sum of protons in an atom's nucleus. It determines the chemical identity of an element.

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What happens when energy knocks electrons out of an atom?

The stability of an atom can be disrupted by applying energy to knock electrons out, creating imbalances.

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What are isotopes?

Atoms with the same number of protons but a different number of neutrons.

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What is the mass number?

The sum of protons and neutrons in the nucleus. It reflects the atom's overall mass.

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What is mass number?

The total number of protons and neutrons in an atom's nucleus.

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What are isotopes?

Atoms with the same number of protons but a different number of neutrons. They have the same chemical identity but differ in their mass.

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What is atomic number?

The number of protons in an atom's nucleus, defining the element's chemical identity.

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What are electrons?

Negatively charged particles that orbit the nucleus. They exist in a cloud around the nucleus, but their exact location is uncertain due to quantum theory.

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What is an ion?

An atom that has lost or gained electrons, giving it a net electrical charge. They can be positive or negative.

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How do electrons orbit the nucleus?

Electrons orbit the nucleus in a way that cannot be precisely determined due to the principles of quantum mechanics.

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What are ions?

Atoms that have gained or lost electrons, resulting in a net positive or negative charge.

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What is electron spin?

The rotation of electrons around their own axis. It generates a magnetic field.

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What is nuclear spin?

The spinning of the nucleus on its axis, contributing to the overall magnetic properties of the atom.

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What is nuclear spin?

The rotation of the nucleus around its own axis. It contributes to the atom's overall magnetic properties.

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What is electron orbital motion?

The motion of electrons around the nucleus, influenced by quantum mechanics and contributing to the atom's magnetic properties.

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