Atoms and Subatomic Particles Quiz

Which of the following subatomic particles is located in the nucleus of an atom?

What is the primary difference between isotopes of the same element?

What is the mass number of an atom that has 8 protons and 10 neutrons?

Which of the following statements is TRUE regarding the relative size of the nucleus and the electron cloud in an atom?

Which of the following statements is TRUE about the charge of an atom?

Which of the following isotopes of carbon is radioactive?

What is the difference between the atomic number and the mass number of an atom?

If an atom has 17 protons and 18 neutrons, what is its atomic number and mass number?

Atoms Consist of Subatomic Particles

Atoms are the smallest unit of matter that retains an element's properties.
Atoms consist of protons, neutrons, and electrons.

Subatomic Particles

Protons have a positive charge (+).
Electrons have a negative charge (-).
Neutrons have no charge.

Atomic Number

The atomic number of an element is the number of protons in its atoms.
Elements have unique numbers of protons.
Every atom of a specific element has the same number of protons.

Mass Number

The mass number of an atom is the total number of protons and neutrons in its nucleus.
Protons and neutrons have nearly the same mass.
Electrons have a much smaller mass.

Isotopes

Isotopes of an element have the same number of protons but different numbers of neutrons.
Isotopes have the same atomic number, but different mass numbers.

Atomic Mass

Atomic mass is approximately equal to the mass number.
Atomic mass is expressed in daltons.

Models of Atoms

Models of atoms show electrons orbiting the nucleus.
Current models show electrons as a cloud around the nucleus.
Models are not drawn to scale. Nuclei are much smaller than electron clouds.

Radioactive Isotopes

Radioactive isotopes have unstable nuclei.
Radioactive decay releases particles and energy.
Radioactive decay can damage cells but also has uses in dating and research.

Test your knowledge on the structure of atoms, including subatomic particles like protons, neutrons, and electrons. Explore concepts such as atomic number, mass number, and isotopes to deepen your understanding of atomic theory.