Use the portion of the periodic table shown below to answer the questions. a portion of the first three columns of the periodic table is shown. (column one from top to bottom -11 sodium 22.990, 19 potassium 39.098, and 37 rubidium 85.468. column two -12 magnesium 24.305, 20 calcium 40.078, and 38 strontium 87.62. column three -21 scandium 44.956 and 39 yttrium 88.906. part 1: name two elements that have the same properties as potassium (k). (4 points) part 2: determine the number of protons, electrons, and neutrons present in an atom of magnesium (mg). explain how you determined your answer using complete sentences. (6 points)

Nconcentration refers to the molar concentration of an ion in solution. it may be identical to, or greater or less than, the molar concentration of the compound containing the ion that was used to make the solution. for soluble salts, the molarity of a particular ion is equal to the molarity of that compound times the subscript for that ion. for example, 1 m of alcl3 is 1 m in al3+ and 3 m in cl−. 1 m of (nh4)2so4 is 2 m in nh4+ and 1 m in so42−. part a what is the concentration of k+ in 0.15 m of k2s? view available hint(s) nothing m m part b if cacl2 is dissolved in water, what can be said about the concentration of the ca2+ ion? view available hint(s) if is dissolved in water, what can be said about the concentration of the ion? it has the same concentration as the cl− ion. its concentration is half that of the cl− ion. its concentration is twice that of the cl− ion. its concentration is one-third that of the cl− ion. part c a scientist wants to make a solution of tribasic sodium phosphate, na3po4, for a laboratory experiment. how many grams of na3po4 will be needed to produce 550 ml of a solution that has a concentration of na+ ions of 0.700 m ? express your answer numerically in grams. view available hint(s) mass of na3po4 n a 3 p o 4 = nothing g provide feedback

When balancing a chemical equation:

Calculate the mass of 0.750 mol of the following substance. na3po4.