5. which of the following is a synthesis reaction? (2 points)
2h2 + o2 → 2h2o
2h2o2 → 2h2o + o2
caco3 → cao + co2
2agno3 + zn → 2ag + zn(no3)2

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.