Table:
text: Molar ionization energies of the elements
21st–30th ionisation energies
21st–30th ionisation energies
number_ symbol name_ _21st _22nd _23rd _24th _25th _26th _27th _28th _29th _30th_
21 Sc scandium 582163         
22 Ti titanium 602930 639294        
23 V vanadium 151440 661050 699144       
24 Cr chromium 157700 166090 721870 761733      
25 Mn manganese 158600 172500 181380 785450 827067     
26 Fe iron 163000 173600 188100 195200 851800 895161    
27 Co cobalt 167400 178100 189300 204500 214100 920870 966023   
28 Ni nickel 169400 182700 194000 205600 221400 231490 992718 1039668  
29 Cu copper 174100 184900 198800 210500 222700 239100 249660 1067358 1116105 
30 Zn zinc 179100         
36 Kr krypton 85300 90400 96300 101400 111100 116290 282500 296200 311400 326200
42 Mo molybdenum 87000 93400 98420 104400 121900 127700 133800 139800 148100 154500

Question: What is the number of the symbol zn for the molar ionization energies of the elements?

Question: How many elements have dates below the 25th percentile of the element's molar ionization energies?

Question: How many names are listed in the table for molar ionization energies of the elements?

Question: Among the molar ionization energies of the elements, which element has the symbol Fe, titanium, or iron?