Write the electron configuration for radium (Ra) A
1s22s22p63s23p64s23d104p65s24d105p6 6s25d106p67s2

B
1s22s22p63p64s23d104p65s24d105p66s2 4f145d106p67s2

C
[Rn] 7s2

D
1s22s22p63s23p64s23d104p65s24d105p6 6s24f145d106p67s2

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

How many atoms are there in 5.70 mol of mg

Which process describes vaporization that takes place below the surface of a liquid? condensation melting boiling evaporation