7Li has 3 protons and 4 neutrons.
7Li is a stable isotope.
The mass excess of 7Li is 14907.10463 with an uncertainty of ±0.00419.
The mass was measured using a Penning Trap and the related equations include:
Influence Equations
100% 7Li-H7 1 Reference 1. Sz. Nagy, T. Fritioff, M. Suhonen, R. Schuch, K. Blaum, M. Bjorkhage,I. Bergstrom (2012), A new mass value for 7Li arXiv https://arxiv.org/abs/1209.5281v1