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What is an isotope?

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Quick Answer

An isotope is an atom that contains a different number of neutrons than its base chemical element. Each element is defined by its respective number of protons. The atomic number of an element refers to its proton count and establishes that particular element within the periodic table.

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What is an isotope?
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In non-ionized elements, the number of protons is equal to the number of electrons, which establishes a neutral charge. While electrons have mass, it is negligible when added to the atomic mass of an element. Atomic mass, therefore, refers to the total number of neutrons and protons. Isotopes, like base elements, are designed by their atomic mass, as in the example of hydrogen-3.

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Related Questions

  • Q:

    How many neutrons does barium have?

    A:

    The number of neutrons in barium depends on what isotope of barium it is. The most common types of barium are barium-138 and barium-137, which have 82 and 81 neutrons respectively. Barium also has 56 protons and 56 electrons, and it has an atomic mass of 137.33 atomic mass units.

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  • Q:

    What is a material that contains only one kind of atom?

    A:

    A material that is made up of only one kind of atom is called a chemical element, a basic element or simply an element. Elements are pure chemical substances distinguished by a unique atomic number.

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    What is the Bohr model for silver?

    A:

    The Bohr model for silver explains the number of electrons, protons and neutrons that are present in the atom, and it diagrams the placement of the electrons within silver’s five energy levels. Silver’s Bohr model indicates that there are 47 protons and 61 neutrons in its nucleus, according to Pennsylvania County Schools. Its 47 electrons are broken up into five energy levels.

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  • Q:

    How do you draw a Bohr model?

    A:

    To draw a Bohr model of an atom, first find the number of protons, neutrons and electrons in the atom from its atomic weight and atomic number. After that, place the neutrons and the protons in the nucleus, and draw the electrons in their designated shells.

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