The half life of iodine 131 is 8.07 days. How long will it take for 1/16 of the iodine to remain?

What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom

Can someone me with 3 and 4 plz. this is for masteries test.