An isotope of indium has 77 protons and 115 neutrons. What is the mass number of this isotope
Isotopes have the same number of protons but different number of neutrons. Carbon has several isotopes: carbon-12, carbon-13, carbon-14, etc. They all have 6 protons but their mass and physical properties change due to the number of neutron.
isotope
The mass number of an isotope tells you the total number of protons and neutrons in the nucleus of that atom. It is used to distinguish different isotopes of an element, as isotopes of the same element have the same number of protons but different numbers of neutrons.
Isotopes of an element differ from each other by having different numbers of neutrons. For example: 1H (hydrogen), 2H (deuterium), 3H (tritium) are isotopes. They have the same number of protons (1) but different numbers of neutrons (0, 1, and 2 respectively).
The number of protons and neutrons is what determines the mass of an isotope. Even though isotopes of a particular element have the same number of protons, but a different number of neutrons, which causes their mass to be different.
The answer you are looking for is "isotopes" HOWEVER, please note you CAN NOT HAVE 2 elements with the same number of PROTONS. This is because the number of protons DEFINES an element. Isotopes are the SAME element but with differing numbers of neutrons.
Isotopes have the same number of protons but different number of neutrons. Carbon has several isotopes: carbon-12, carbon-13, carbon-14, etc. They all have 6 protons but their mass and physical properties change due to the number of neutron.
isotope
The mass number of an isotope tells you the total number of protons and neutrons in the nucleus of that atom. It is used to distinguish different isotopes of an element, as isotopes of the same element have the same number of protons but different numbers of neutrons.
Number of neutrons = Atomic mass of an isotope - Atomic number of the element; the atomic number of Lr is 103. Lawrencium has many isotopes and each isotope has a different number of neutrons.
Isotopes involve different atomic masses. It is sum of number of protons and neutrons.
The atomic mass equals neutrons and protons. This is true in non isotopes as well.
Isotopes are atoms with a different number of neutrons but with the same number of protons.
Isotopes of an element differ from each other by having different numbers of neutrons. For example: 1H (hydrogen), 2H (deuterium), 3H (tritium) are isotopes. They have the same number of protons (1) but different numbers of neutrons (0, 1, and 2 respectively).
All the isotopes of uranium contain 92 protons; the number of neutrons is variable for each isotope: Number of neutrons = Atomic weight of the given isotope - 92
The number of protons and neutrons is what determines the mass of an isotope. Even though isotopes of a particular element have the same number of protons, but a different number of neutrons, which causes their mass to be different.
oxygen has 8 protons as its atomic number is 8. The number of neutrons depends on the isotope. O-15 isotope will have 7 neutrons, O-16 isotope will have 8 neutrons. (Note: Mass number = Number of protons + number of neutrons)