Choose the element which is negligible in living matter |
|||||||
a) |
Si |
b) |
Mg |
c) |
d) |
S |
Choose the element which is negligible in living matter |
|||||||
a) |
Si |
b) |
Mg |
c) |
d) |
S |
(a)
Silicon is almost negligible in living organism. A comparison of elements present in non-living and living matter is as follows
Element |
% Weight of Earth’s crust Human Body |
|
Hydrogen (H) Carbon (C) Oxygen (O) Nitrogen (N) Sulphur (S) Sodium (Na) Calcium ( ) Magnesium (Mg) Silicon (Si) |
0.14 0.03 46.6 Very little 0.03 2.8 3.6 2.1 27.7 |
0.5 18.5 65.0 3.3 0.3 0.2 1.5 0.1 negligible |
*Adapted from CNR Rao, Understanding Chemistry Universities Press Hyderabad