Answer:
Length
- centimetre
- millimetre
- kilometre
- meter
Mass
- gram
- kilogram
Capacity
- liter
- millilitre
I don't know why mass is there but hope this helps! :)
1.) Na
2.) Cl ( at the second blank)
sodium metal+hydrochloric acid
Answer:
#2: They break down quicker than stable isotopes. - im not sure
Explanation: