88Sr has 38 protons and 50 neutrons.
88Sr is a stable isotope.
The mass excess of 88Sr is -87921.62876 with an uncertainty of ±0.00561.
The mass was measured using a Penning Trap and the related equations include:
Influence Equations
58.3% 88Sr-86Kr1.023 1
41.7% 88Sr-84Kr1.048 1
Reference
1. R. Rana, M. Hocker, E.G. Myers (2012) Atomic masses of strontium and ytterbium
Physical Review A 86(5)
https://journals.aps.org/pra/abstract/10.1103/PhysRevA.86.050502