<span>H2O water molecule is inorganic. Organic molecules contains carbon atom. Pentane, Butane, and Glucose have carbon in their molecules. Water is inorganic it contains hydrogen and oxygen. there is no carbon molecule. Carbohydrates, lipids etc are examples of organic molecules.</span>
After 1 half life, 1/2
After 2 half lives, 1/4
After 3 half lives, 1/8
Answer:
Rows on the periodic table represents a period, which is the number of energy levels or rings. It is the last shell which valence electrons are on.
For example the first row waas Hydrogen and Helium which each have one energy level.
The esecond row has Carbon and Oxygen which has two energy level.
The third row has Sodium which has three energy levels and so on.
C chemical since it is after all made of chemicals