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Is the mass number equal to the number of protons and electrons?
No, it isn't. 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 the electron, the positron, has the same mass as the electron.the mass of the electron is not the same to the mass of the proton
Do Protons have the same magnitude of charge as electrons but are opposite in sign?
No. Protons are positive and neutrons are neutral. Protons have exactly the opposite charge as that of electrons, even though they differ greatly in mass. Proton is 1826 times heavier than electron.
Which particles determine the mass of an atom?
The atomic mass unit is defined to be 1/12 of the mass of a carbon-12 atom. Atomic masses can determined by weighing molar amount of an isotope. Absolute masses (in kg) are determined by measuring the amount that charged atoms are deflected by magnets, since if you know the charge you can calculate mass from the amount of deflection.
Most massive particles in an atom?
99.9% of an atom's mass is concentrated in the nucleus, with protons and neutrons having almost the same mass, with neutrons being slightly higher. So your question would be, 'What atom has the most protons and neutrons combined?' And that answer is Nobelium. Nobelium has 102 protons and 160 neutrons which makes it the most 'massive' atomic particle, even more so then Lawrencium which has 103 protons but only 159 neutrons. Of course, in a few months, we could have a new, more massive element.
Protons plus neutrons plus electrons equals mass number?
The atomic weight/mass is the average weight of all the isotopes of that element. Adding the number of protons and neutrons together does equal to the atomic weight, but only if you round the decimal.For example the element sulfur (atomic number 16) has an atomic mass of 32.066. This is not a whole number, but that does not mean that sulfur has 16.066 neutrons. Instead, you would just say that the atomic mass is 32 amu and subtract the number of protons, which is the same as the atomic number, from the atomic mass. Sulfur therefore has 16 neutrons, protons, and electrons.
Which particles control the weight of an atom?
The protons and neutrons, but not the electrons since they are about thousand times lighter than protons and neutrons.
What particle control the 'weight' of an atom?
The weight of an atom is primarily controlled by the total number of protons and neutrons in its nucleus. Protons and neutrons have approximately the same weight, while electrons have negligible mass compared to protons and neutrons.
Is alpha particles heavier than beta particles?
Yes. A beta particle is just an electron, while an alpha particle is effectively a helium nucleus - two protons plus two neutrons. Protons (and neutrons) are each about 2000 times heavier than an electron. Therefore, an alpha particle is about 8000 times heavier than a beta particle.
Where is the most of the mass in an atom?
Most of the mass in an atom is in the nucleus. The protons and neutrons are about the same weight, 1 amu. The elecrtons are 1/1840 of the mass of an proton. Neutrons are 2000 times heavier than electrons and protons have an equal mass of neutrons
Have about 1800 times less mass than protons and neutrons?
Electrons have ~1800 times less mass than protons and neutrons
What do Neutrons and protons have a weight about 1840 times?
an electron.
Are electrons bigger than neutrons and protons?
Electrons are 1,836 times lighter than protons. A proton is 99.8% the mass of a neutron
Why does the number of electrons have little effect on overall mass of atom?
The protons and neutrons that make up the nucleus are much heavier than an electron. Protons and neutrons are almost the same weight as each other and are just over 1800 times as heavy as an electron. there are the same number of electrons as protons in a neutral atom and typically a number of neutrons as well, so the percentage by weight of electrons is very small.
How many times heavier is a copper atom compared to an oxygen atom?
A copper atom is about 63 times heavier than an oxygen atom. This is because copper has an atomic number of 29 and oxygen has an atomic number of 8, meaning that a copper atom has approximately 63 times more protons and neutrons in its nucleus than an oxygen atom.
What subatomic particle is heaviest?
Protons and neutrons are roughly 1800 times heavier then electrons.
Is an alpha particle lighter than an electron?
No, an alpha particle is not identical to an electron. An alpha particle is a helium-4 nucleus, and it's composed of a pair of protons and a pair of neutrons fused together. It several thousand times the mass of an electron, and has twice its charge with an opposite sign (+2). An electron is that little negatively charged (-1) elementary particle that we find whizzing around atoms. You'll find a pair of related questions linked below.
What is Z A and N if the nuclide of lead that contains 1.5 times as many neutrons as protons?
For lead, the number of protons (Z) is 82, since the atomic number of lead is 82. If the nuclide contains 1.5 times as many neutrons as protons, then the number of neutrons (N) would be 1.5 times 82, equaling 123.
