This chemical element is krypton.
Isotopes are atoms of the same element that have different numbers of neutrons. Different isotopes of an element have the same atomic number, but different mass numbers. I hope I helped! ^_^
Two different isotopes of an element have different numbers of neutrons. That's what an isotope is. So, no, isotopes of an element can not have the same number of neutrons.
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The two notations represent atoms that are isotopes of the same element is 121 Sn and 119 Sn. The atomic mass of an element is defined as the weighted average mass of that elements naturally occurring isotopes.
The mass number would be different for different isotopes of the same element.
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Two different neutral isotopes of the same element have the same number of protons in their nucleus, which determines the element's identity. The isotopes differ in the number of neutrons they have, which leads to variations in atomic mass but not in chemical properties.
Isotopes of an element have the same number of protons in their nuclei (same atomic number) but different numbers of neutrons, resulting in different mass numbers. This difference in neutron content gives each isotope unique physical properties such as stability, radioactivity, and atomic mass.
Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons. This results in isotopes having the same chemical properties but different atomic masses.
An isotope is simply a certain element with a different atomic mass, for example carbon 12 is the same element as carbon 13 because it has the same number of protons, but it has an atomic mass of 12 because it has a different number neutrons. On the periodic table, the atomic mass labeled is normally the average atomic mass, or the mass of the most stable isotope. So to answer your question two different isotopes of the same element have a different number of neutrons, but the same number of protons and electrons.
Two atoms of the same element can have different masses if they contain different numbers of neutrons. These are known as isotopes of the element. Isotopes have the same number of protons and electrons, but differing numbers of neutrons, which can slightly alter their atomic mass.
The Proton number defines the element, so there cannot be two atoms of the same element with different proton numbers, because they will be, by definition, different elements. Neutron numbers can differ though. When one element has different neutron configurations, these are called Isotopes.