Acombustion reaction usually gives off heat and light is it true or false

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

Avoltaic cell converts chemical energy to

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material