M=7M(H₂O)
M=7*18.015 g/mol = 126.105 g/mol
Answer: An alpha-particle is identical to the nucleus of a normal (atomic mass four) helium atom i.e. a doubly ionised helium atom. Alpha particles (also termed alpha radiation or alpha rays) was the first nuclear radiation to be discovered, beta particles and gamma rays were identified soon after.
Delta waves are associated with a deep sleep~