Question

10. Avogadro's number can be used to find the number of atoms in an element.- T

12. A photon is a quantum of light energy.- T

17. The atomic mass unit is determined by Oxygen-16.- F

18. The number of particles in a mole is a constant.- T

19. The number of protons is always equal to its number of neutrons.- F

20. Wavelength is the distance between corresponding points on adjacent waves.- T

21. Frequency is the number of waves that pass a given point, usually in one second.- T

Thanks
-MC

Answer 1

all correct.