Shoulder Season (May & Nov) 1  Rising May temperatures herald the onset of the wet season around Manila and elsewhere. 2  November sees high-season rates kick in.
Nuclear Decay Definition. Nuclear decay or radioactive decay is the emission of energy and matter because of change in the nucleus of atom. The nuclear decay involves the emission of ionizing particles or ionizing radiation.
Alpha decay is a form of nuclear fission in which the parent atom splits into two daughter products. When an atomic nucleus releases an alpha particle, the atom decays (is transformed) into another atom with a mass number that is lower by 4 and an atomic number that is lower by 2. For example, the alpha decay of radium atoms converts them to radon atoms, released as a gas.