When asking for mass what label do you use

What is the most stable monatomic ion formed from nitrogen

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?