The table shows the amount of radioactive element remaining in a sample over a period of time: What is the half-life of the element in hours?
Group of answer choices
a. 63 hours
b. 7 hours
c. 21 hours
d.14 hours

What kind of intermolecular forces act between a hydrogen fluoride molecule and a hydrogen peroxide molecule? note: if there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force.