The answer to the question is radium (Ra)
Answer:
Some energy is lost as heat
Explanation:
It is correct to say that as the gasoline is converted to mechanical energy in the automobile engine, some of the energy is lost as heat.
Heat energy is on of the ways energy is lost in any system. The movement of mechanical parts and even the combustion of the gasoline produces heat energy.
These energy are usually lost to the environment.
Answer: option D.
The total number of atoms of each element on both sides of the
equation must be the same.
Explanation:
Atoms (Sodium and Fluorine)
