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

What are the charges of the subatomic particles by choosing the answer from the drop down menu. protons have a (+1,0,or-1). (protons,neutrons,electrons) have a 0 charge. 3.) electrons have a (+1,0,-1)

Which position represents spring in the southern hemisphere? a) b) c) d)

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules