Nickel and copper
Tin and copper
Zinc and copper
Brass and nickel
20%
30%
35%
40%
300°C
327°C
54°C
600°C
Cathode ray
Gamma ray
Beta ray
Alpha ray
Much lower than that of men
Marginally lower than that of men
Higher than that of men
The same as that of men
Argon isotope
Carbon 14
Strontium 90
Uranium 238
industrial discharges
solar eruptions
lighting discharges
distant stars
a colourless gas insoluble in water
a black solid
a highly inflammable gas
a red liquid
Al2O3
NaAIO2
Na2SiO3
CasiO3
0.80 cal/gm
80 cal/gm
800 cal/gm
8000 cal/gm