After decaying for 48 hours, 1/16 of the original mass of a radio isotope sample remains unchanged. what is the half-life of this radio isotope

Solar energy is energy from the sun that is converted into thermal or energy. a. nuclear b. mechanical c. electrical d. chemical

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.