Question

Give one word or a phrase for the following statements
1. A polyatomic ion with one unit positive change
2. A representation of a molecule of an element or compound
3. The charged porticles formed when an atom (or a group of atoms) gains or loses electrons
4. A chemical substance that citers the chemical reochon without itself undergoing any
chemical change
5. A chemical reaction indocted by two half crowheads pointing in oooosite direchons​

Answer 1

Answer:

hydrogen

helium 2,1

positive or negative ions