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An element, such as lead with its 82 protons per atomic nucleus, does not have a mass number, although it does have an average Atomic Mass, which for lead is 207.2. This is constituted from four lead isotopes that are radioactively stable. The isotopes have mass numbers of 204, 206, 207, and 208.
The mass number of an element is the sum of its protons and neutrons in the nucleus. Since lead (Pb) has an atomic number of 82, the mass number would be the total of protons and neutrons in a lead atom, which can vary based on the isotope.
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What mass number is americium?
The mass number of Am-241 is 241; each isotope has another mass number.
How do you find the number of neutrons from the mass number?
To find the number of neutrons from the mass number, subtract the atomic number from the mass number. The atomic number represents the number of protons in an atom, and by subtracting it from the mass number, you can determine the number of neutrons present.
What is the mass number for sodium?
The mass number for sodium is 23.
What is the the mass number for bromine?
Bromine is a non metal element. Mass number of it is 80.
What is d mass number of gold?
The mass number of gold is 197.
What is the atomic number of Pb82?
Lead is a meta element. Atomic number of it is826.
How many electrons are in lead outer shell?
82. Lead is an element with symbol Pb and atomic number 82. The atomic number relates to the amount of electrons of the element
What mass number is americium?
The mass number of Am-241 is 241; each isotope has another mass number.
How do you find the number of neutrons from the mass number?
To find the number of neutrons from the mass number, subtract the atomic number from the mass number. The atomic number represents the number of protons in an atom, and by subtracting it from the mass number, you can determine the number of neutrons present.
Can mass be a number?
yes mass can be a number
What is the mass number for sodium?
The mass number for sodium is 23.
What is the mass number for the element uranium?
The atomic weight of uranium is 238,02891(3) atomic mass units. The mass number is the total number of nucleons (protons an neutrons) in the nucleus; the mass number is different for each isotope: 234U: mass number 234 235U: mass number 235 238U: mass number 238
Mass number - atomic number equals?
Mass number minus the atomic number equals the number of neutrons. Mass number is the number of particles in an atom that have significant mass. Electrons are assigned a value of 0 since the mass is so much smaller than protons and neutrons. Protons and neutrons are similar in mass and are assigned mass number of 1. The formula for calculating atomic mass atomic mass = # protons + # neutrons.
Why do you subtract the atomic number from the mass number?
We can find atomic mass and mass number in chemical elements. Atomic mass is about weight of the atom. Mass number is about total of neutrons and protons.
Why is the atomic mass number not a whole number?
We can find Atomic Mass and mass number in chemical elements. Atomic mass is about weight of the atom. Mass number is about total of neutrons and protons.
How do you find out the mass number?
Mass number = Number of protons + number of neutrons
What is the difference between the atomic number mass number and atomic mass?
We can find Atomic Mass and mass number in chemical elements. Atomic mass is about weight of the atom. Mass number is about total of neutrons and protons.
