total number of its protons and neutrons multiplied by the atomic mass unit, u = 1.660539 × 10-24gram. (Electrons are much lighter, about 0.0005486 u.) No atom differs from this simple formula by more than 1%, and stable atoms heavier than helium all lie within 0.3%.SeeAtomic mass ...
ESCAPE (European SpaceCraft for the study of Atmospheric Particle Escape) is a mission that has been proposed to ESA, in response to the M5 call, to quantitatively estimate the amount of escaping particles of the major atmospheric components (nitrogen and oxygen), as neutral and ionised species,...
for 9 min; after that, it was increased 12 °C min−1reached a temperature of 250 °C, and it was maintained for 10.5 min. The injection port temperature was 200 °C and the split was 11:1. The auxiliary gas for pyrolysis was 2% helium hydrogen, with a flow of 0.20–0.25 mL ...