Alpha Decay Electron Capture
Beta Decay
Positron Emission
14,N + °..
Type
Le
238
92
Type
U-234
90 Th1
15
15
-N +
Type
Type
32
+
e
ѕР
105
Type
-
105
46Pd
47Ag + +
Type
+1
e+
40
boca
Type
244
Pu— Не +

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.