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Iodine -131 undergoes radioactive decay to form an isotope with 54 protons and 77 neutrons what type of decay occur in this isotope?
Wiki User
∙ 12y ago
The number 131 on the end shows us the mass of the isotope of iodine
If there are 53 protons, you need to take that away from the mass number to get the number of neutrons
(Remember, electrons have such a small mass, we say that they have no mass at all, just to make it easier)
131 - 53 = 78
So the answer is A
Wiki User
∙ 14y ago
Wiki User
∙ 12y agobeta decay?
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How man protons does an element have to have to make it radioactive?
One proton is in tritium, a radioactive isotope of hydrogen with two neutrons.
What is the process by which an unstable isotope will emit nuclear radiation until it has a stable number of protons and neutrons called?
radioactive decay
How many protons and neutrons does radium have?
88
Are there 2 neutrons in the helium 4 isotope?
No, there are actually 2 protons and 2 neutrons in the helium-4 isotope. The number of protons determines the element, while the sum of protons and neutrons gives the atomic mass of an isotope.
How many protons neutrons and electrons are there in a neutral atom of the isotope of lanthanum named lanthanum-138?
Protons: Any atom of lanthanum has 57 protons. Neutrons: Lanthanum has 30 radioactive isotopes with neutron numbers ranging from 60 to 96 but the only stable isotope(139La) has 82 neutrons. Electrons: The number of electrons is normally the same as the number of protons.
How man protons does an element have to have to make it radioactive?
One proton is in tritium, a radioactive isotope of hydrogen with two neutrons.
What has 36 protons 43 neutrons and 36 electrons?
This is the radioactive isotope bromine-78.
What radioactive isotope has 68 protons and 31 neutrons?
Element #68 is Erbium. The number of the isotope, of course, is the sum of the protons + neutrons. Checking the Wikipedia article "Isotopes of erbium", it looks as if this isotope doesn't actually exists.
What is the process by which an unstable isotope will emit nuclear radiation until it has a stable number of protons and neutrons called?
radioactive decay
What is a plutonium atom?
An radioactive, unstable atom with 94 protons and electrons and a variable number of neutrons - depending on the isotope.
What element has 46 protons and 55 neutrons?
The number of protons defines an element - the number of neutrons isn't needed to find the identity of the element. All ions and isotopes with 44 protons is ruthenium. However, with the information about the neutrons, we know the specific isotope: 101Ru.
How many protons and neutrons does radium have?
88
What isotope has 16 protons and 15 neutrons?
Sulfur-31 is the isotope with 16 protons and 15 neutrons.
Isotope with 13 protons and 14 neutrons?
The isotope that has 13 protons and 14 neutrons is aluminum.
What is an istoscope?
This may be about an isotope. An isotope of an element has a particular number of protons and neutrons. The number of protons determines the number of electrons and hence the chemistry. Most elements van have a varying number of neutrons. Some isotopes are unstable and are subject to radioactive decay others are stable.
Are there 2 neutrons in the helium 4 isotope?
No, there are actually 2 protons and 2 neutrons in the helium-4 isotope. The number of protons determines the element, while the sum of protons and neutrons gives the atomic mass of an isotope.
How many protons neutrons and electrons are there in a neutral atom of the isotope of lanthanum named lanthanum-138?
Protons: Any atom of lanthanum has 57 protons. Neutrons: Lanthanum has 30 radioactive isotopes with neutron numbers ranging from 60 to 96 but the only stable isotope(139La) has 82 neutrons. Electrons: The number of electrons is normally the same as the number of protons.
