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Terms in this set (11)

  • What is the atomic number of an atom?

    The atomic number is the number of protons in the nucleus of an atom.

  • What does the mass number of an atom represent?

    The mass number is the sum of the number of protons and neutrons in the nucleus.

  • What particles make up the nucleus of an atom?

    The nucleus is made up of protons and neutrons.

  • Do neutrons or protons determine the element identity?

    The number of protons determines the element identity, not neutrons.

  • What is an isotope?

    Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons.

  • What characteristic do neutral atoms of all isotopes of the same element share?

    They have the same number of electrons.

  • How do ions differ from neutral atoms?

    Ions differ in the number of electrons compared to neutral atoms; protons remain the same.

  • What is the charge of a Ga ion with 28 electrons and 31 protons?

    The ion is Ga3+ because it has 3 fewer electrons than protons.

  • What is the charge of a Ba ion with 54 electrons and 56 protons?

    The ion is Ba2+ because it has 2 fewer electrons than protons.

  • What is the charge of an F ion with 10 electrons and 9 protons?

    The ion is F- because it has 1 more electron than protons.

  • What is the charge of a Po ion with 86 electrons and 84 protons?

    The ion is Po2- because it has 2 more electrons than protons.