An atom has an atomic number of 19 and a mass number of 29. How many neutrons are in the atom?

10

Explanation:

You take the atomic number and subtract it from the atomic mass. So in this case it would be 29-19 thus giving us 10.

yes, water is wet, just as it makes other things wet, it is wet itself, kinda like ice, when ice is in water, the ice makes water cold, and ice is cold, therefore with that example, water is wet

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )