Two of most unique elements on the periodic table are hydrogen and helium. What makes them so unique and removed from the other
groups on the periodic table? a
Unlike all other elements, hydrogen and helium are gases
b
Unlike all other elements, hydrogen and helium are not considered metals
c
Unlike all other elements, hydrogen and helium only have a maximum of 2 valence electrons
d
Unlike all other elements, hydrogen and helium have very limited properties
A. Unlike all other elements, hydrogen and helium are gases
<h3>What is special about hydrogen and helium?</h3>
Hydrogen and helium are the lightest elements in the periodic table having mass number 1 and 2 respectively. They both exist in the form of gases at room temperature. Both Hydrogen and helium are the two most common elements in the universe. Hydrogen make up about 75% of all matter present in the universe. Hydrogen belongs to the metal group but it is not metal but a gas.
So we can conclude that option A is the right answer for the given question.
I'm just guessing since this is my prediction. Either B. or D. I dont know about C. and it is definitely not A. since the lumber companies are only taking down some trees instead of all of them.
