1. Locate the element on the Periodic Table.
2. Find the element’s atomic number (which is the same as the number of protons)
3. Find the element’s atomic weight.
4. Round off the atomic weight to the nearest whole number to find the Atomic Mass.
5. Subtract the atomic number from the atomic mass (The numbers after the decimal point represent the usually very small mass of the electrons in the atom.)
The mass number
mass number
the mass number is determined on the number of protons and neutrons in the nucleus of the atom.
20. the mass of an atom is determined by the sum of the number of neutrons and protons the atom has.
Atomic mass.
By subtracting number of protons from atomic mass. Number of neutrons can be determined.
subtract the atomic NUMBER from the atomic MASS
Sum of protons and neutrons.
You look really closely and count them
Atomic mass is the number of protons in an atom plus the number of neutrons in the same atom.
Different isotopes of an atom are determined by the number of neutrons it contains.
Atom mass is mainly determined by the number of protons AND neutrons.
Protons and Neutrons comprising the atom's nucleus.
Subtracting the atomic number from the isotope mass number.
No, only by the atomic number, also known as the number of protons.
it is the sum of the protons and neutrons present in the nucleus of the atom.
The number of neutrons can be determined by subtracting the number of protons from the atomic mass. These numbers are provided for an element on the Periodic Table.
The element is determined by the atomic mass of an atom, more specifically, the number of protons and neutrons in the nucleus.
The mass number of an isotope indicates the total number (the sum) of protons and netrons in an atom.The number of protons is determined by the atomic number.The number of neutrons can be found by subtracting the atomic number from the mass number.
The number of neutrons is the mass number of the atom minus its atomic number.
The number of protons, neutrons and electrons within the atom.
The number of neutrons depends on the atom. In general, mass number = atomic number + number of neutrons.
The atomic mass is mainly determined by the total number of protons AND neutrons.
Protons, neutrons and electrons
The number of neutrons in an atom can affect the atomic mass of an atom.