Can be disproved - supported with repeated testing - valid if there is no evidence to dispute it the list of terms best describes a a) hypothesis. b) law. c) theory. d) variable.

C.  Theory.  Theories are accepted explanations of phenomenon based on no evidence to dispute it.  Theories can be disproved and are not perfectly accurate.

Its C) A scientific theory summarizes a hypothesis or group of hypotheses that have been supported with repeated testing. If new evidence is found, a theory can be refuted.

ammonium chloride & tallow

explanation:

considering the bohr theory, the type of connection that requires the transfer the answer conuldn't be right