Except catalyst because catalyst typically speed up a reaction by reducing the activation energy or changing the reaction mechanism.
The length of time required for half of the radioactive atoms in a sample to decay is its <span>half-life. The correct option among all the options that are given in the question is the first option or option "A". The other choices are incorrect and can be easily neglected. I hope that this is the answer that has come to your help.</span>
Answer:
Explanation: what do you need help on??? :?
Okay well it is saying you will have to give the vaccine to the patient from the shot thingy i guess
