Biology questions? answer them please thanks?

Question

1. An atom that has more or fewer neutrons than its stable form is called a(n) ____________________.

2. A molecule that will give up a hydrogen ion in a water solution is called a(n) ______________.

Answer 1

1. isotope

2. acid

Answer 2

Additionally to 1: exist stable isotopes.

http://en.wikipedia.org/wiki/Stable_isot...