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A photon is a light particle or an EM wave. As a particle, it is conceptually simple to think of a photon as a point (zero) mass. One consequence of Einstein's special theory of relativity is that a particle of a finite mass can never approach the speed of light, which is made of photons. It is equally nonsensical to assign a mass to a wave, which is propagation of energy packets (one can think of waves as the travel of information). Conceptually speaking, how can information have a mass?
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∙ 15y ago
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∙ 14y agoThey have mass, it is just too little in comparison to the mass of the neutron and protons to be taken into account. Therefore when measuring the mass of an atom, the mass of the electron are not used. (To be exact,9.10938188 × 10-31 kilograms, and the mass of proton is 1.67262158 × 10-27 kilograms.)
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∙ 13y agoIt is negligible because of how small it is.
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∙ 14y agoThe mass of an electron is often considered negligible because it is so small. :) Hope this helped you out!!
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∙ 13y agoThe mass of the election is insignificant, if you are saying that it is 1/1840, that is the relative mass, which is why it is negligible. Hope that helps you.
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∙ 14y agoYes, photons are massless.
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∙ 12y agoteri ma di lun
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What is the mass number of an electron?
An electron has a mass of 9.109 X 10-31 kg, approximately 1⁄1840 the mass of a proton. However, the term mass number doesn't apply to electrons, it applies to atomic nuclei. The mass number of a nuclear isotope is the total number of protons and neutrons, together known as nucleons, of the isotope, and is denoted by (A).
What is the mass in AMU's of an electron?
1 over 1,836 AMUAnother answerIt's negligible. It has such a low amu that it is not a factor of the overall atomic mass of an atom
How many times greater is the mass of a proton than the mass of an electron?
1836 times the mass of an electronSo how do you calculate '1836 times the mass of a proton' ?Mass of proton = 1.673 x 10-27 or (10 to the power of negative 27)Mass of electron = 9.109 x 10-31 or (10 to the power of negative 31)Simply by dividing the largest mass (of protons) by the smallest mass (electrons):(1.67262 . 10-27) / (9.10939 . 10-31) = [1.67262 /9.10939] . [10(-27)-(-31)] =0.1836 . 10+4 = 1836
What element has one proton and is found in water?
hydrogen atomic mass 1 atomic number 1 1 proton 1 electron 0 neutrons
How many neutrons and electrons are in Hydrogen?
Normal HydrogenOne ProtonOne Electron DeuteriumOne ProtonOne NeutronOne Electron Tritium (radioactive)One ProtonTwo NeutronsOne Electron
Why electron don't have mass?
An electron does have mass, but it's so small that it's often considered 0. If the mass of a proton or neutron is 1, then the mass of an electron is about 1/1836.
What has a mass of 0 amu and a charge of -1?
The electron has a charge of -1; but the electron has a mass.
Do electrons have any mass?
Yes, electrons have a mass, as everything has mass. However, an electron's mass is so small that it is considered to be 0.
What is the number of atomic mass in an atom?
Relative mass number of an electron is 0
What are Atoms 3 particles?
Proton - Relative Atomic Mass of 1, charge of 1. Neutron - Relative atomic mass of 1, charge of 0. Electron - Negligible mass (0), charge of -1.
What is the mass number of an electron?
An electron has a mass of 9.109 X 10-31 kg, approximately 1⁄1840 the mass of a proton. However, the term mass number doesn't apply to electrons, it applies to atomic nuclei. The mass number of a nuclear isotope is the total number of protons and neutrons, together known as nucleons, of the isotope, and is denoted by (A).
What is the mass in AMU's of an electron?
1 over 1,836 AMUAnother answerIt's negligible. It has such a low amu that it is not a factor of the overall atomic mass of an atom
What part of an atom is not used in calculating the mass number?
All parts of the atom weigh something but when doing calculations electrons are said to have a mass of 0. This is because they actually have a mass of 1/1836 amu which is insignificantly small and so it is disregarded.
How many times greater is the mass of a proton than the mass of an electron?
1836 times the mass of an electronSo how do you calculate '1836 times the mass of a proton' ?Mass of proton = 1.673 x 10-27 or (10 to the power of negative 27)Mass of electron = 9.109 x 10-31 or (10 to the power of negative 31)Simply by dividing the largest mass (of protons) by the smallest mass (electrons):(1.67262 . 10-27) / (9.10939 . 10-31) = [1.67262 /9.10939] . [10(-27)-(-31)] =0.1836 . 10+4 = 1836
What does a.m.u stand for?
Atomic mass unit. Unit for mass for atoms & their sub-atomic particles. An electron is rounded to 0 amu (since its mass is less than 1 amu). A proton and a neutron are 1 amu each.
What are the charges and relative masses of the main subatomic particles?
electron = relative charge = 1- relative mass = 1/1840 proton = relative charge = 1+ relative mass = 1 neutron = relative charge = 0 relative mass = 1
Does alpha particles easily absorbed?
Yes, alpha particles are easily absorbed. They have a mass of 4 and a charge of +2. As such, they easily interact, being stopped, for instance, by only a few inches of air. Compare this with the neutron (mass 1, charge 0), electron (mass 1/1836, charge -1) and the photon (rest mass 0 charge 0) and you can see an increase in penetration as you go up the scale.
