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80 protons and 121 neutrons
Look at the atomic number. That will be the number of protons and electrons; subtract that number from the atomic mass (rounding down) and you'll have the number of neutrons.
63-29 = 34 neutrons 29 = atomic number of copper
simple, the bottom number that is missing is the atomic number. Pu is plutonium which happens to have the atomic number of 94. subtract the top number (mass number) and the atomic number and you get the amount of nuetrons, so the answer is 145 neutrons. (its an isotope)
atoms try to get 10 electrons on shells around the atom. how many shells the atom has is based on the atomic number and atomic mass the atomic number determines how many shells their are.
16 - 8 = 8.
it is about 68 to 69 depending on the atoms atomic mass
There are too many elements to list how many nuetrons each one has, but as a general rule of thumb you can subtract the atomic number (number of protons) from the molecular mass number (Which is generally the number of protons and nuetrons added, since electrons weigh very little) to obtain the number of nuetrons For example, Carbon has an atomic mass of 12. Subtract the atomic number, which is 6, and you will get the number of nuetrons, which is also 6.
Number of neutrons = Atomic mass of the isotope - 87
80 protons and 121 neutrons
Look at the atomic number. That will be the number of protons and electrons; subtract that number from the atomic mass (rounding down) and you'll have the number of neutrons.
63-29 = 34 neutrons 29 = atomic number of copper
The atomic mass is 79.90 and it has 35 protons. Take the atomic mass and subtract it from this number and you get 44.90=45 nuetrons approximately.
you subtract the atomic number by the number of atoms
I don't have a periodic table, but round its atomic mass to a whole number and subtract the amount of protons which equal the atomic number. So if the atomic mass is 24 and the atomic number is 12, 24-12=12.- example
Neutrons are sub-atomic particles. The Periodic Table is an arrangement of the elements (atoms) made from these subatomic particles. Thus Neutrons by themselves have no place in the Periodic Table. However as all elements/atoms (except Hydrogen) contain some Neutrons, it is possible to find out how many using the information presented on the Periodic Table. The number of Neutrons present in an element/atom can be determined by subtracting the atomic number of an element/atom from its atomic mass.
simple, the bottom number that is missing is the atomic number. Pu is plutonium which happens to have the atomic number of 94. subtract the top number (mass number) and the atomic number and you get the amount of nuetrons, so the answer is 145 neutrons. (its an isotope)