A chemist prepares a solution of sodium carbonate by measuring out 22.9 g of sodium carbonate into a 150 mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in of the chemist's sodium carbonate solution. Round your answer to significant digits.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

it takes on an electronical energy

what are the statements