Atom - Human- World.

Atom - Human- World.

14 january 2021 / 08:59 41
Atom - human- world. The entire world - from dust particles to huge galaxies - is made up of atoms. The atom is the fundamental unit of every element. To date, 118 elements have been identified (all of which are in the Periodic Table).
How many atoms are there in the human body? A person weighing 70 kg consists of 7 * 10 ^ 27 atoms. Three atoms (hydrogen (H), oxygen (O) and carbon (C)) make up 99 percent of the total. Even more interesting, 98 percent of these atoms are renewed every year without even realizing it. The fastest changing molecule is water: almost 50 percent of the water molecules in the body are replaced every 8 days. What's more, a human hair - 100 nanometers across - is made up of a million carbon atoms.
How many atoms are there in the universe? The observable universe is vast, spanning approximately 93 billion light years. According to a theoretical estimate, there are from 10 ^ 78 to 10 ^ 82 ((10 ^ 82 = 10,000,000, 000,000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000, 000)) atoms in our universe. (Calculations are based on reliable data).