What are the 2 most common elements in the universe?
singleAnswer
Hydrogen and Helium
Abundance of the chemical elements
What are the 2 most common elements in the universe?
Abundance of the chemical elements Chemical element Nucleosynthesis Talk:Chemical element/Archive index Nuclear transmutation Oddo–Harkins rule Carbon-based life Iron Helium Carbon
Hydrogen is the <b>most abundant element in the Universe</b>; helium is second. ... 
Only about <b>2</b>% (by mass) of the Milky Way galaxy&#39;s disk is&nbsp;... The <b>two</b> lightest elements, hydrogen and helium, were mostly formed in the Big 
Bang and are the <b>most common elements in the universe</b>. The next three&nbsp;... Nucleosynthesis is the process that creates new atomic nuclei from pre-existing 
nucleons ... A star formed in the early <b>universe</b> produces heavier <b>elements</b> by 
combining its lighter nuclei – hydrogen, ... At the same time it was clear that 
oxygen and carbon were the next <b>two most common elements</b>, and also that 
there was a&nbsp;... These are the ten <b>most common elements in the Universe</b> as measured in parts 
per million, <b>2</b>, Talk:Chemical element/Archive 1#These are the ten most common
&nbsp;... Nuclear transmutation is the conversion of one chemical element or an isotope 
into another ... vast majority of the <b>most common elements in the universe</b>, 
including helium, oxygen ... Hydrogen and helium together account for 98% of 
the mass of ordinary matter in the universe, while the other <b>2</b>% makes up 
everything else. The Oddo–Harkins rule holds that an <b>element</b> with an even atomic number (such 
as carbon: <b>element</b> 6) is more <b>abundant</b> than both <b>elements</b> with the adjacently ... 
Next three <b>elements</b> with atomic numbers more than <b>2</b>—Li, Be, and B, with ... 
does not apply to the <b>universe&#39;s most abundant</b>, and simplest <b>element</b> from the&nbsp;... Carbon is a primary component of all known life on Earth, representing 
approximately 45–50% ... 1 Characteristics; <b>2</b> Key molecules; 3 Other candidates; 
4 Fiction; 5 See also ... Carbon is the 15th <b>most abundant element</b> in the Earth&#39;s 
crust, and the fourth <b>most</b> ... &quot;Life in the <b>Universe</b>, 50th anniversary celebration of 
NASA&quot;. It is also very common in the universe, relative to other stable metals of 
approximately the same atomic weight. Iron is the sixth <b>most abundant element in</b> 
<b>the</b>&nbsp;... Helium is a chemical <b>element</b> with the symbol He and atomic number <b>2</b>. It is a 
colorless, ... Helium is the second lightest and second <b>most abundant element</b> in 
the observable <b>universe</b> (hydrogen is the lightest and <b>most abundant</b>). It is 
present&nbsp;... Carbon is the fourth <b>most abundant</b> chemical <b>element</b> in the observable <b>universe</b> 
by mass after hydrogen, helium, and oxygen. Carbon is <b>abundant</b> in the Sun,&nbsp;...
Hydrogen helium
Abundance of the chemical elements