Question

We can see from the above table that about 97% of the total mass of human body
can be attributed to the combined mass of four elements. Can you identify them?
(1) ..................... (2)
..... (2) ....... .............. (3) ................... (4)
(4) ...
Examinatin​

Answer 1

Answer:

Ninety-seven per cent of the human body consists of stardust, claim scientists who have measured the distribution of essential elements of life in over 150,000 stars in the Milky Way galaxy.

The six most common elements of life on Earth - including more than 97 per cent of the mass of a human body - are carbon, hydrogen, nitrogen, oxygen, sulphur and phosphorus. It is an undeniable fact that most of the essential elements of life are made in stars, researchers said. "For the first time, we can now study the distribution of elements across our Galaxy," said Sten Hasselquist of New

Mexico State University in the US.

"The elements we measure include the atoms that make up 97 per cent of the mass of the human body," Hasselquist said. The new results come from a catalogue of more than 150,000 stars; for each star, it includes the amount of each of almost two dozen chemical elements.The new catalogue includes all of the "CHNOPS elements" - carbon, hydrogen, nitrogen, oxygen, phosphorous, and sulphur - known to be the building blocks of all life on Earth.