Answer:
Metals on the left of the Periodic Table.
Non-Metals on the top-right, plus Hydrogen.
Answer:
3 because it the element that combined the form
You can tell if each side of the equation has the same molar mass.
Answer:
balances and scales, measurement transducers, vibrating tube sensors, Newtonian mass measurement devices and the use of gravitational interaction between objects.
Explanation: