An element has an atomic number of 10. the number of protons and electrons in a neutral atom of the element are
20 protons and 10 electrons
10 protons and 10 electrons
10 protons and 20 electrons
20 protons and 20 electron

h let me think

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: