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Is the element with the least atomic mass hydrogen or is it helium?
Wiki User
∙ 8y ago
The answer is Hydrogen.
Wiki User
∙ 8y ago
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What is the element with the least atomic mass is hydrogen or helium?
Hydrogen's atomic mass (1 amu for the most stable isotope) is less than that of helium (4 amu).
Which element is the least atomic mass?
Hydrogen.
Does hydrogen or helium have the least atomic mass?
Hydrogen has the lowest atomic mass of all the elements. Hydrogen has one proton and one electron. Helium, two neutrons, two protons and two electrons.
Why can gases such as helium escape earth's atmosphere?
Helium can escape because it is the least dense element after Hydrogen.
Is a helium atom larger than a neon atom?
helium as it contains 2 protons, while hydrogen only contains 1. Additionally, the orbit of the 2 electrons in a neutral helium atom would also be larger than the orbit of the single electron in hydrogen.
Which has the least number of atoms 5g of hydrogen or 10g of helium?
helium
How are helium and hydrogen different?
Hydrogen and helium, both gasses, differ greatly in:the number of protons and electrons (1 or 2),the number of neutrons (0 or 2),their Atomic Mass 1.0 or 4.0 ,and not at least in their reactivity (highly explosive or inert).
What are the three lightest noble gases?
Technically Helium is classed as a Noble gas and has a MW of 4g/mol.
What element has the lowest density of all of the elements?
The element which has been measured to have the lowest density is hydrogen. Not only is hydrogen the least dense element, it is also the most plentiful on earth.
Which atomic particle has the least mass?
hydrogen
What is the least active of the following nonmetals is helium carbon chlorine or oxygen?
Helium is the least reactive element, to the point of being unreactive.
Is hydrogen the least common element?
No.
