The number of protons in the nucleus is the number of blank

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)

Directions: count the number of atoms. ar co2 na3po4 so3 nac2h3o2