Suppose you found a material in which 6.25% of the original radioactive atoms are present. If the half-life is 47 years, how old is the material? *

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.