Looking across period 4 of the periodic table, potassium (atomic number 19) is followed by calcium (atomic number 20), which is followed by scandium (atomic number 21). Which element should have the l
Looking across end 4 of the endic board, potassium (ultimate estimate 19) is followed by calcium (ultimate estimate 20), which is followed by scandium (ultimate estimate 21). Which component should keep the largest ultimate radius? A) potassium B)calcium C)scandium D)All three keep the selfselfsame ultimate radius.