Mass is measured using different types of balances.
drum
periscope.
The instrument used to measure a angle is called a protractor!
A Triple Beam Balance is used to find the mass of an object.
A sundial
if you know the specific gravity and the volume of the substance you can find the mass.
newtons
Accordian
a intrument from visayas
Find the mass of a known volume of the liquid and use the formula mass/volume to find the density.
To find the number of neutrons in an atom you subtract the atomic mass fromthe mass number
A scale