Answer:
Electrical energy
Explanation:
Electrical energy is caused by the moving of electrons.
hope it helps!
Helium was discovered in 1868.
Answer:
A. To study the chemical composition of the surface of a planet
Explanation:
Strictly speaking, a spectrometer is any instrument used to view and analyze a range (or a spectrum) of a given characteristic for a substance (for example, a range of mass-to-charge values as in mass spectrometry), or a range of wavelengths as in absorption spectrometry like nuclear magnetic radiation spectroscopy
-hope this helps!
Answer:
phosphorus.
Explanation:
The atomic number of phosphorus is 15 so the protons will be 15.
