Respuesta :
hydrogen, accounts for 74% of the mass while helium contributes 25%. Heavier elements comprise less than 1% of the total.This universe was 13.7 billion years old, adding or subtracting approximately 130,000 years, as determined by NASA's WMAP probe.
Why do hydrogen and helium make up the majority of the universe's mass?
The vast quantities of helium and hydrogen that were created during the Big Bang account for the majority of the chemical elements' abundance in the cosmos.Only 2% of the universe's mass is made up of remaining elements, which were primarily created by supernovae and some red giant stars.
Why is hydrogen most prevalent in the universe but has a low percentage on Earth?
As the only element in the cosmos without a neutron, hydrogen is the most basic in the universe, that explains why it is also the most plentiful, according to Nyman. Hydrogen has just one proton one and electron.
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