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The mass of an electron is negligible compared to the mass of a proton or neutron. Electrons are true fundamental particles and protons and neutrons (collectively; nucleons) are not.
Electron mass is 9.11 x 10E-31 kg. A proton's mass is 1.67 x 10E-27 kg and a neutron is very slightly heavier. However, an approximation would be that a proton or an electron is about 1800 times heavier than an electron.
Almost all of the mass of an atom is in the nucleus and thus amounts to the mass of the protons and neutrons only. The nucleus-orbiting electrons have negligible mass by comparison.
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What determines the mas of an atom?
The mass of an atom is determined by the combined mass of its protons, neutrons, and electrons. Protons and neutrons are the primary contributors to the mass, while electrons have a negligible mass in comparison.
What particles make up the mass of an atom?
The number of protons
How would you calculate the atomic mass of atom without using the periodic table if you know the number of protons electrons and neutrons?
Add the number of protons plus the number of neutrons for an approximate answer. Compared to protons and neutrons, electrons have zero mass - it takes over 1800 electrons to equal the mass of a proton or neutron.
How many protons neutrons and electrons in Sc with mass number 44?
21 protons, 21 electrons and 23 neutrons
What is the atomic mass composed of?
Atomic mass is composed of the mass of protons, neutrons, and electrons within an atom. Protons and neutrons reside in the nucleus of the atom, while electrons orbit around the nucleus. The sum of the masses of protons and neutrons is the primary contributor to the atomic mass.
Which of these statements is false all neutrons are alike all electrons are alike all protons are alike all atoms are alike?
True statements: All neutrons are alike, all electrons are alike, all protons are alike (All atoms of a given isotope is only alike). False statement: All atoms are alike All atoms are not alike as they may vary in the number of protons / electrons / neutrons.
How many protons neutrons and electrons does Ca have?
Electrons have no relevant mass, and protons and neutrons both have the mass of 1u. If Calcium has the number 20, it has 20 protons (and electrons). It's mass is about 40u. Core Mass - Protons = Neutrons 40u - 20u = 20u, this means Calcium has 20 electrons, 20 protons and 20 neutrons.
What determines the mas of an atom?
The mass of an atom is determined by the combined mass of its protons, neutrons, and electrons. Protons and neutrons are the primary contributors to the mass, while electrons have a negligible mass in comparison.
What is the mass of an atom mainly determined by?
The sum of masses of protons, neutrons and electrons.
What is the number of protons in the necleus?
# of protons = # of electrons # of protons/ electrons + # of neutrons = atomic mass
What particles are used to determined the mass of an atom?
Mass of an atom = mass of protons + mass of neutrons
How are protons and neutrons related?
For a stable atom, no. of protons= no. of electrons no of neutrons= Atomic Mass- no. of protons
What particles make up the mass of an atom?
The number of protons
How many protons electrons and neutrons does americium have?
Americium has 95 protons and electrons. Number of neutrons: atomic mass of an isotope - number of protons
What plus what determines the atomic mass?
protons plus neutrons
How are electrons and protons related?
For a stable atom, no. of protons= no. of electrons no of neutrons= Atomic Mass- no. of protons
How would you calculate the atomic mass of atom without using the periodic table if you know the number of protons electrons and neutrons?
Add the number of protons plus the number of neutrons for an approximate answer. Compared to protons and neutrons, electrons have zero mass - it takes over 1800 electrons to equal the mass of a proton or neutron.
