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about 20,000 electrons P.S Your an idiot^^^^ who ever put that, it is 7300 electrons
it is the sum of the number of neutrons and protons Mass number is the sum of number of neutrons and protons while atomic number is equal to number of protons or electron…s..
It would take about 333,000 earths to match the mass of the sun.
The mass of an electron is significantly smaller than that of a proton. The mass of 1,800 electrons is about the same as the mass of one single proton. The antiparticle of t…he electron, the positron, has the same mass as the electron.
How many moons would it take to equal the mass f earth? I am going to assume you are referring the Earth's moon. This is a rather simple calculation. We simply take the ma…ss of the Earth, and divide by the mass of the moon. We can express the formula like this. mass of moon * number of moons = mass of Earth therefore mass of Earth ÷ mass of moon = number of moons The mass of the moon is approx. 7.347 7 × 1022 kg. The mass of the Earth is 5.9736×1024 kg. Now, it is a simple matter of division, and we can get the number 81.30081 recurring, so lets just say 81.3.
1836 electrons equal the mass of 1 proton. A proton has a mass of 1.0073 amu, a neutron 1.0087 amu, and an electron 5.486 x 10-4. So, it would take 1836 electrons to equal t…he mass of 1 proton.
Protons and neutrons equal atomic mass. Although an atom has the same amount of protons as electrons, saying that electrons + neutrons = atomic mass would be incorrect as th…e mass of an electron is, in comparison, very small.
No, it is slightly greater.
Mars is 0.107 times the mass of earth. The reciprocal of that is the number of planets the mass of Mars it would take to equal a planet the mass of earth, or a little over 9 …and 1/3.
They are opposite in charge. Protons have a positive charge and electrons have a negative charge. The mass of a proton is 1838 times that of an electron. Mass of electron: 9….10939 x 10-31 kg Mass of proton: 1.67262 x 10-27 kg
In a way yes, it is really only the amount of protons and neutrons, but electrons are so small they carry so little weight that they add so little consequece to the atomic wei…ght of an atom.
Protons are much heavier (1800 X approx) than electrons! Atomic mass is due to the mass of the protons and neutrons only a very small % of atomic mass is due to electrons.