Oh, what a lovely question! You see, electrons are much lighter than neutrons. It takes about 1836 electrons to equal the mass of just one neutron. Isn't it amazing how nature balances everything so beautifully?
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The mass of a neutron is approximately the mass of a proton...so
= 1.66 X 10 -27 kg
-------------------------------approximate neutron mass
Electron mass.
= 9.109 X 10 -31 kg
-----------------------------------so,
1.66 X 10 -27 kg/9.109 X 10 -31 kg
= about 1822 electrons to equal mass of neutron
================================
no electrons have mass, about 1/1800 that of a proton or neutron.
1 proton and 1 neutron is needed because the 2 in hydrogen 2 refers to the atomic mass and protons and neutron have a mass of about 2 daltons each.
atomic number is the amount of protons, equal to the atomic number, the electrons, minus the mass number atomic number is the amount of protons, equal to the atomic number, the electrons, minus the mass number atomic number is the amount of protons, equal to the atomic number, the electrons, minus the mass number
Electrons have a negative charge, are much smaller than protons and neutrons, and are located in orbitals around the nucleus. Protons have a positive charge, are located in the nucleus of an atom, and determine the element's identity. Neutrons have no charge, also reside in the nucleus of an atom, and help stabilize the nucleus.
Yes, there is a relationship between atomic mass and the number of protons and neutrons in an atom. The atomic mass is approximately equal to the sum of the number of protons and neutrons in an atom, as electrons have negligible mass compared to protons and neutrons. The number of electrons in a neutral atom is equal to the number of protons, in order to maintain a balanced charge.