Masa atómica

The video tutorial explains atomic mass, which is measured in units equivalent to the mass of a proton. It covers the total rest mass of protons, neutrons, and electrons in an atom, highlighting how atomic mass can vary between isotopes due to changes in the number of neutrons.

What is the atomic mass unit approximately equivalent to?

• The mass of an electron

• The mass of a molecule

• The mass of a proton

• The mass of a neutron

What does atomic mass represent in an atom?

• The total number of electrons

• The total rest mass of protons, neutrons, and electrons

• The total volume of the atom

• The total number of protons

Which particles contribute to the atomic mass of an atom?

• Only protons

• Only neutrons

• Only electrons

• Protons, neutrons, and electrons

Why does atomic mass vary between isotopes?

• Because the number of protons changes

• Because the number of electrons changes

• Because the number of neutrons changes

• Because the atomic volume changes

What is the primary reason for the variation in atomic mass among isotopes?

• Different atomic volumes

• Different numbers of electrons

• Different numbers of neutrons

• Different numbers of protons