- 1 decade agoFavorite Answer
Ca belongs to Group 2 while Na belongs to Group 1 in the
Periodic Table .
It is easier for Na to lose one electron to form Na+
than Ca to lose two electrons to form Ca2+ .
In the E.C.S. , the position of Ca is higher than that of Na means
Ca is a stronger reducing agent and has a higher ability to reduce
others while oxidizing itself .
Why ? Na should be the one who lose electron more readily .
Ca is in Period 4 while Na is in Period 3 ,
Ca has one more electron shell than Na ,
the attraction from the nucleus on the outermost electrons of Ca
is thus less than that of Na.
- 1 decade ago
Ca E.C.S排得高過Na o既???????????????
K, Na, Ca, Mg, Al..........
Ca need to give out 2 electrons to form a Ca2+ ion, it is easy to lose the first electron, but more difficult (compare with the first electron) to lose the second electron from Ca+ (positive charge) ion.Source(s): me