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The mass of a positron is approximately 9.1093826(16) × 10−31 kg. The positron and the electron are anti-particles of each other, and you can find out more about the positron at the Wikipedia article on that subject. A link to their post can be found below. There is also a link to a related question on the nature of the positron. That's down there, too.
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∙ 15y ago
Wiki User
∙ 13y agoThe positron is the antiparticle of the electron. So, it is positive. Antiparticles are always the opposite of their matter particle. They are of the same mass and of opposite charge. When a particle and antiparticle meet, they annihalate each other in a blast of energy in the form of photons, a boson that yeilds the electromagnetic force.
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∙ 13y ago+1 of the elementary charge, versus -1 for the electron.
Wiki User
∙ 13y ago0 as in zero. A positron is an anti-electron. It has a mass in the order of 10^-31 kg.
Wiki User
∙ 13y agoSame as an electron.
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What radionuclide decays to Br-73 by positron emission?
Work backwards. Positron emission means (essentially) a proton decayed into a neutron/positron pair. The mass number remains the same, but the atomic number goes down one to Bromine. Krypton has an isotope that fits this bill.
The rest mass energy of an electron positron pair is?
Twice the mass of the electron, since the positron has the same mass of the electron. Or the equivalent, in energy units.An electron has a mass or energy of 511 keV.
Do radioactive emissions have a charge?
Depends on what type of radioactive decay you are talking about. Beta decay (electron or positron) will have a charge, while alpha decay will not. Beta decay can either be positron decay or electron decay. Positron will result in the parent to have the same atomic mass but a different atomic number. The atomic number will be one less than that of the parent. Meaning one proton will decay into a neutron and a positron, which is a positively charged particle. Electron decay results in the parent gaining a proton while the atomic mass stays the same. A neutron decays into a proton and an electron and the electron is emitted with a negative charge. Alpha decay, however, results in the emission of a neutral helium particle. Gamma decay results in the same parent with no loss of charge or atomic number and gives off a high energy photon called a gamma particle.
Which of the following particles has the same mass as an electron but a positive charge and is sometimes emitted from the nucleus during radioactive decay?
A positron.
What is the kind of decay that occurs when a nucleus releases a positron?
There is technically no such thing as positron decay. It's a misnomer. The nuclear decay process wherein a positron is emitted from a decaying nucleus is called positron emission or beta plus decay. A link is provided below that question and its answer.
What is the change in atomic number when an atom emits a positron?
Emitting a positron, turns a proton into a neutron. So the atomic number goes down by 1, while the mass number remains the same.
What radionuclide decays to Br-73 by positron emission?
Work backwards. Positron emission means (essentially) a proton decayed into a neutron/positron pair. The mass number remains the same, but the atomic number goes down one to Bromine. Krypton has an isotope that fits this bill.
The rest mass energy of an electron positron pair is?
Twice the mass of the electron, since the positron has the same mass of the electron. Or the equivalent, in energy units.An electron has a mass or energy of 511 keV.
When radioactive phosphorus decay it emits a positron will the resulting nucleus be another isotope of phosphorus?
No, whenever an atom emits a positron its atomic number is decreases by one unit (because a proton is converted into a neutron and a positron) but atomic mass remains the same so phosphorus is converted into silicon atom with same atomic mass.
How is a positron different from an electron?
A positron is an electron's antiparticle. It has the same mass as an electron, but an opposite electrical charge.
Does the exact mass of a positron have a series of values?
yes
Which type of particle has an atomic number of -1 and a mass number 0?
This question probably refers to a positron, although I am not sure that the description of it as having a negative atomic number is widely recognized.
What is A subatomic particle that has no charge and very small mass is called?
Positron
Which type of radiation has a negligible mass and a charge of plus 1?
This is a positron.
How do positron emission and electron capture change an atom?
After positron emission or electron capture the atomic number is decreased with one.
Another name for positive charge?
The usual term is "positron." It's the antiparticle of an electron, having the same mass but opposite charge and opposite "electron number".
Why isn't electron and positron mass equal?
Their masses are equal. It's their charges that are opposite.
