5th lonization 1st lonization
Energy
2nd lonization
Energy
3rd lonization
Energy
4th lonization
Energy
Energy
578
1,820
2,750
11,600
14,800
25. The above table shows successive ionization energies for an unknown element from
period 3. What is the unknown element?
a. Na
b. Mg
C. AI
d. si
e. P

Energy is released during which phase changes? check all that apply. boiling condensing depositing freezing melting subliming

Apeak with a retention time of 407 s has a width at half-height (w1/2) of 7.6 s. a neighboring peak is eluted 17 s later with a w1/2 of 9.4 s. a compound that is known not to be retained was eluted in 2.5 s. the peaks are not baseline resolved. how many theoretical plates would be needed to achieve a resolution of 1.5?

An atom's configuration based on its number of electrons ends at 3p4. another atom has seven more electrons. starting at 3p, what is the remaining configuration? 3p63d34s2 3p43d54s2 3p64s23d3 3p44s23d