why do the isotopes of an element have different atomic masses?
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Different isotopes of the same element have the same atomic number. They have the same number of protons. The atomic number is decided by the number of protons. Isotopes have different mass numbers, though, because they have different numbers of neutrons.
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Elements can be identified by their atomic number and mass number. Isotopes are atoms of the same element that have different masses. Atoms have a mass that is based largely on the number of protons and neutrons in their nucleus. ... The chemical elements are arranged in a chart called the periodic table.
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Atoms of the same element always have the same number of protons ( is it had a different number of protons it would be a different element). However atoms of the same element can have different numbers of neutrons (this gives them a different mass number). Different versions of the same element are called isotopes.
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These are called isotopes. They have the same number of protons (and electrons), but different numbers of neutrons. ... Because different isotopes have different numbers of neutrons, they do not all weigh the same or have the same mass. Different isotopes of the same element have the same atomic number.
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Atoms of the same element, containing the same number of protons, but different numbers of neutrons, are known as isotopes.
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Atoms of the same element that differ in their numbers of neutrons are called isotopes. ... Different isotopes of an element generally have the same physical and chemical properties. That's because they have the same numbers of protons and electrons.
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All atoms of the same element are exactly alike and have the same mass. Atoms of different elements are different and have different masses.
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These different kinds of the same element are called isotopes. Isotopes are atoms that have the same atomic number (and are therefore of the same element) but different mass numbers.
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No, an element is where all atoms have the same number of protons. An ion is an atom that has different number of protons and electrons. An isotope is an atom of an element with a specific number of neutrons.
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Isotopes are the atoms of the element having same Atomic number (Z) but different Atomic mass (A). This means isotopes of an element have same number of Protons but different number of Neutron in their nuclei. and thus has 8 Neutrons.
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The atoms of different isotopes are atoms of the same chemical element; they differ in the number of neutrons in the nucleus.
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Isotopes have a same number of electrons and protons in all atoms. A . B . Isotopes : They are the atoms of a given element which have the same atomic number (Z) but different mass number (A) i.e. They have same Nuclear charge (Z) but different number of Neutrons (AZ).
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The relative atomic mass of an element is a weighted average of the masses of the atoms of the isotopes. ... They have the symbol A r. Take care not to confuse mass numbers and relative atomic masses: mass numbers are always whole numbers (protons or neutrons cannot be split into parts)
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Since 1961 the standard unit of atomic mass has been one-twelfth the mass of an atom of the isotope carbon-12. An isotope is one of two or more species of atoms of the same chemical element that have different atomic mass numbers (protons + neutrons).
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In contrast, the number of neutrons for a given element can vary. Forms of the same atom that differ only in their number of neutrons are called isotopes. Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons.
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Atoms of a particular element must have the same number of protons but can have different numbers of neutrons. When an element has different variants that, while all having the same number of protons, have differing numbers of neutrons, these variants are called isotopes.
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An element's mass number (A) is the sum of the number of protons and the number of neutrons. ... Protons and neutrons both weigh about one atomic mass unit or amu. Isotopes of the same element will have the same atomic number but different mass numbers.