Question

What two elements is the universe made primarily of?

Answer 1

Answer:

Of those 11, two of them make up the majority of the star: hydrogen and helium. This means the most common elements in the universe are hydrogen and helium. These two elements comprise around 98% of all the elements in the universe, with hydrogen at 75% and helium at 23%.

Explanation:

The next three elements on the periodic table (lithium, beryllium, and boron) are over 107 times less abundant. When dealing with the universe you have to deal with unfathomable numbers!

There is a significant uptick in abundance of the next few elements: carbon, nitrogen and oxygen, but they are roughly 103 to 104 times less abundant than hydrogen.

Answer 2

Answer:

Helium and hydrogen together make up 99.9% of all known matter in the cosmos.

Explanation:

• The periodic table's elements, which serve as the universe's building blocks, were generated during the Big Bang. There are a distinct number of protons (positively charged), neutrons (neutral), and electrons in each element (negatively charged).
• As the only element in the cosmos without a neutron, hydrogen is the most basic element in the universe, which explains why it is also the most plentiful, according to Nyman. Hydrogen has just one proton and one electron. (However, deuterium, an isotope of hydrogen, has one proton and one neutron, while tritium has one proton and two neutrons.)
• According to Encyclopedia.com, hydrogen atoms in stars fuse to produce helium, the second most prevalent element in the universe. Two protons, two neutrons, and two electrons make up helium.

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