Zirconium cannot be broken down by a chemical change, because it is an element. The others are all molecules.
Answer:
C. the number of atoms, molecules, ions, formula units, or other particles in a mole of a substance
Explanation: Its correct
Answer: option D. triple bond and one lone pair
Explanation:
n = m/M = 2/18 = 1/9 ~0,1 mol
Answer: Radio waves has the lowest energy and longest wavelength.