mass number
because the atomic is the sum of no of proton and no of neutron
The sum of the number of the protons and neutrons in the nucleus of an atom is called as atomic mass.
Atomic mass is defined as the sum of the no. of proton and neutron present in the nucleus of an atom and Atomic Number is defined as the no. of electrons present in the extra nuclear part of an atom . BY; SHUBHAM KAKKAR
This is the sum of all protons and neutrons in an atom. On the periodic table, it has the average for that element.
Protons and neutrons make up almost all the mass of an atom. Consider that the proton is about 1836 times more massive than an electron, and that the neutron is slightly more massive than the proton, and it becomes crystal clear.
because the atomic is the sum of no of proton and no of neutron
In this case, the number 209 represents the sum of protons + neutrons.
The mass number is sum of neutrons and protons in the atomic nucleus.
The Atomic Number. Remember the Atomic Number, of an elements is ;- #1 The position in the Periodic Table #2 The number of protons in the nucleus #3 The number of electrons in the neutrally charged atom. NB Do NOT confuser Atomic Number with Atomic Mass. Atomic Mass the total number of nucleons in the nucleus of af an atom. Nucleons is the collective noun for the sum of all the protons and neutrons in the nucleus.
The sum of the number of the protons and neutrons in the nucleus of an atom is called as atomic mass.
The whole is less than the sum of the parts. A proton or neutron (nucleon) will have less mass in a nucleus that outside it. That's because some of the mass of a nucleon is converted into binding energy to hold an atomic nucleus together. That's the so-called mass deficit. Oh, and before we go, a proton or neutron is called a nucleon only inside the nucleus of an atom. We don't apply that term to either one when they're outside the nucleus.
Its the mass number of an atom.The mass of an atom is concentrated in the nucleus. Both protons and neutrons which are collectively known as nucleons are found within the nucleus.Mass of electrons are not considered to be contributing towards the mass no. of an atom as their size is small and thus their mass is negligible.
mass number
The sum of the protons and neutrons in the nucleus
The three main sub-atomic particles of an atom are proton, neutron and electron. The mass of a proton is about 1800 times the mass of an electron and the masses of proton and neutron are almost similar. Hence, mass of only proton and neutron is counted towards the mass of an atom.
The mass number is the sum of protons and neutrons in the nucleus of an atom.
Atomic mass is defined as the sum of the no. of proton and neutron present in the nucleus of an atom and Atomic Number is defined as the no. of electrons present in the extra nuclear part of an atom . BY; SHUBHAM KAKKAR