Read the given expression. X = atomic number - number of core electrons
Which of the following explains the identity of X and its trends down a group?

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

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.

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.