What type of radiation is emitted when polonium-212 forms lead-208?
a. an alpha particle
b. a beta particle
c. gamma radiation
d. all of the above

What can be found in the ionosphere

Which of the following are correct values for the ideal gas laws constant r

#7 how does the structure of amino acids allow them to form a polypeptide? each amino acid has an amino group and a carboxyl group. each amino acid has a hydrogen atom and a carboxyl group. each amino acid has a carboxyl group and an r group. each amino acid has an r group and a hydrogen atom.