Describe how the electronic structure of these elements changes across the period 3

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In the whole of period 3, the outer electrons are in 3-level orbitals. ... In fact the increasing nuclear charge also drags the outer electrons closer to the nucleus. That increases ionisation energies still more as you go across the period.

Explanation:

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:

one state would change   like louisiana to texas. thats a change

explanation: