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The mass number of an atom is determined by the number of neutrons and protons. Since you already know the number of neutrons, you just need the number of protons, then you can add them together. I happen to know that iodine has 53 protons, so that means that the mass number is 127.It is the protons and neutrons added together so when you add 53 and 74 you get 127!
Hope that helped a lot!! :):):):):):):)
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∙ 15y ago
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How many Nuetrons are there in one atom of boron whose mass number is 10?
5
What is the sum of a proton and nuetrons in the nucleus of an atom?
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.
How many nuetrons are in fluorine with a mass number of 19?
Fluorine is a non metal element. Mass number of it is 19.
How can you determine the number of neutrons in an atom if its mass number and its atomic number are known?
It is impossible to determine the number of neutrons from the mass number and atomic mass, since the two are essentially same value. However, with the atomic number and the mass number, one can calculate the number of neutrons by subtracting the atomic number from the mass number.
What is the isotope iodine 75?
There is no such isotope (75) known. Iodine (atom number 53, average atomic mass 127) has 53 protons and 70 up till 82 neutrons. The lowest known isotope number therefor is 123.
What is the sum of the number of protons and the number nuetrons in an atom?
mass number
What is the total number of protons and neutron's in an atom called?
mass number = protons + nuetrons
What is the sum number of protons and nuetrons in the nucleas of a atom?
The Mass Number.
How do you determine the number of nuetrons in an atom?
Number of Neutrons = Mass number - Atomic Number
What is the total number protons and neutrons in an atom called?
mass number = protons + nuetrons
How do you find the atomic mass number of an atom of an element?
add the number of protons and nuetrons together
How many Nuetrons are there in one atom of boron whose mass number is 10?
5
What information must be known in order to calculate the mass number if an atom?
The mass number = the number of protons + the number of nuetrons. Each of these particles is considered to have a mass of 1 amu. (atomic mass unit) For example, Aluminum has 13 protons and 14 nuetrons, so it's mass number = 27.
The number of protons and nuetrons in the nucleus of an atom?
The atomic mass number or nucleon number. The atomic mass number is written in superscript on the left of the elements symbol.
What is the difference between an atomic number and mass number?
no. of protons+no. of nuetrons in an atom is known as mass no. of that atom.while no . of protons present in an atom is called its atomic no.thus, in 1st condition we consider both, no. of protons as well as no. of nuetrons and in the 2nd condition we just consider no. of protons.
The sum of the numberof protons and nuetrons in the nucleus of an atom?
The sum of the number of the protons and neutrons in the nucleus of an atom is called as atomic mass.
Which particles in a atom have a mass of 1?
protons and nuetrons
