How many protons are there in an atom of neon-21(Ne,#10)?*

Neon-20 has 10 Protons

Neon-21 has 11 Protons

Neon-22 has 12 Protons.

"For neon, which has 10 protons, the mass numbers of the three different naturally occurring isotopes are 20, 21, and 22, corresponding to 10, 11, and 12 neutrons, respectively. Percent means "per hundred." 90.48% means that 90.48 atoms out of 100 are the isotope with 10 neutrons."

this was already solved by me with a different person. if you look it up in the search bar at the top of the page, you will get the answer.

step-by-step explanation:

there will be 35 boys in each team. : )