223 /87 Fr 0/-1 + E A/Z X
What is the atomic mass of the new atom?
To determine the atomic mass of the new atom, we need to add up the atomic masses of all the constituents.
The atomic mass of the atom with the atomic number 223 is 223.
Since "Fr" stands for francium and has an atomic mass of approximately 223, we add 223 to our total atomic mass.
For the second constituent, "0/-1", it seems to represent a subatomic particle, most likely an electron. The atomic mass of an electron is negligible compared to the other constituents, so we do not add anything to our total atomic mass for this.
For "E", "A", "Z", and "X" we do not have any specific information to determine their atomic masses, so we cannot add anything to our total atomic mass for these.
Therefore, the atomic mass of the new atom is approximately 223.