2.
An ion has 15 protons, 16 neutrons, and 18 electrons.
a.
b.
What is the atomic number?
What is the mass number?
What is the overall charge?
d. Write the isotope notation.
C.
The element is P (Phosphorus) and the atomic number is just the number of protons so for A it would be 15.
For B to find the atomic mass you would just have to add the protons and neutrons so 15+16=31 and as we can see Phosphorus does have a mass of 31 so for B it would be 31
For C it would be 5 And for D it would be the atomic mass of Phosphorus which is 31 over the atomic number which is 15 so it would be P31/15
