1)state the difference between anions and cations.
2)explain the terms valence electrons and valency.
3)what is a balenced chemical equation?
4)what do the following symbols reprensent in a chemical equation a) S b) i c) G d) AQ
1. Anions are negatively charged ions and cations are positively charged ions.
2. Valence electrons are the electrons in the outermost shell of an atom. Valency is the combining capacity of an atom of the element.
3. A chemical equation in which the mass of reactants on the reactants side is equal to the mass of products on the products side.
4. s - solid, i - ionic, g - gaseous, AQ - aqueous