Answer:
The base unit for time is the second the other SI units are: metre for length, kilogram for mass, ampere for electric current, kelvin for temperature, candela for luminous intensity, and mole for the amount of substance!
Explanation:
I hope i helped =)
Its d its the only one that makes sense
potassium reacts the most vigorously.
No of protons=107+1=108
No. Of neutrons=158
Mass no. =166
