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An element's atomic mass does not include the mass of its?
An element's atomic mass does not include the mass of its electrons. Electrons have such a small mass compared to protons and neutrons that they are not typically included in calculations of atomic mass.
What substance has electrons but no protons?
Neutrons do not have any charge but have mass, whereas electrons have a negative charge and negligible mass. However, there is no known substance that specifically has electrons without protons.
Why mass of electrons is excluded from atomic mass?
The mass of electrons is not excluded from atomic mass. The mass number of an isotope of an element excludes electrons because it is the sum of protons and neutrons.From Wikipedia, "The atomic mass (ma) is the mass of a specific isotope, most often expressed in unified atomic mass units. The atomic mass is the total mass of protons, neutrons and electrons in a single atom."
Which subatomic particles have very little mass and a negative charge-?
You're probably thinking of electrons, whose mass is much smaller than nucleons but also have a negative charge. Indeed, the electron has the smallest amount of mass of any particle with a negative charge.
Why does the number of electrons have little effect on the overal mass of an atom?
Electrons are very light. Protons are approx. 1800 X the mass (rest mass to be presice). Neutrons are about the same mass a protons. So the mass of all the electrons has little effect.
Why do you say the mass of any element is in the nucleus and you ignore the mass of the electrons?
The mass of any atom is in the nucleus because it contains both protons and neutrons. Protons and neutrons have a significantly greater mass than electrons do, so electrons are ignored when finding the mass of an atom.
How many electron does it take to balance the mass of just 1 proton?
About 1837.This is why you can safely ignore the mass of electrons for any known element in rough calculations; the total mass of the electrons will be well under 0.1 amu.
Is the number of electrons the same thing as the atomic mass in an atom?
No, electron count really doesn't have anything much to do with atomic mass. Let's look. Most of the mass of any atom is concentrated in the nucleus. It's the protons and neutrons there that give the atom "weight" and the electrons contribute almost nothing. Additionally, electrons can be loaned or borrowed by atoms, and this changes their mass very little. The number of electrons is not very "connected" to atomic mass of an atom.
How many electrons are present in an atom of mercury whose mass atomic number is 80 and whose mass number is 201?
no of electrons in any atom is equal to the atomic number of that element so no of electron is 80
When bromine reacts with other elements it gains electrons gaining electrons does not effect the mass of the bromine atoms explain why?
electrons have no mass
Which subatomic particles have very little mass and a negative charge-?
You're probably thinking of electrons, whose mass is much smaller than nucleons but also have a negative charge. Indeed, the electron has the smallest amount of mass of any particle with a negative charge.
Why does the number of electrons have little effect on the overal mass of an atom?
Electrons are very light. Protons are approx. 1800 X the mass (rest mass to be presice). Neutrons are about the same mass a protons. So the mass of all the electrons has little effect.
Is it true that Unlike protons or neutrons electrons have no mass?
no electrons have mass, about 1/1800 that of a proton or neutron.
What is the mass of 5.010 18 electrons?
The mass of 5.1018 electrons is 45,546 910 75.10-13 kg.
A neutral atom of gold has a mass number of 197 and has 118 neutrons how many electrons does it have?
Any neutral atoms has the same number of electrons as protons, and any atom has a number of protons equal to the difference between its mass number and neutron number. Therefore, this atom has 197 - 118 = 79 electrons.
How do you find an atomic mass?
It is nothing but the total no of protons and electrons .So it is found by summing the total no protons and electrons present in an atom It is not electrons but the total of neutrons and protons present in the nucleus of any atom.
Why is it important for electrons to have no mass?
Electrons having mass is essential for understanding their behavior in the realm of particle physics. Mass affects various interactions of electrons, such as their ability to couple with the Higgs field to acquire mass or participate in the weak force interactions. Without mass, electrons would not be able to form stable atoms, and the entire foundation of chemistry and matter as we know it would be fundamentally different.
