What is true of electrons? 1. They are negatively charged and located inside the nucleus

2.They are positively changed and located inside the nucleus

3. They are negatively charged and located outside the nucleus

4. They positively changed and located outside the nucleus

The answer is option 3.

Explanation:

Electrons are negatively charged and is located outside the nuclues.

Protons are positively charged, neutrons are neutral and both are located inside the nucleus.

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation:

it is the most commonly accepted one