Count the number of allotropes of Carbon, then subtract the number of isotopes of hydrogen. What do you get?
Carbon has 8 allotropes (naturally existing, stable and pure forms of the element). Arrange carbon atoms one way, and they become soft graphite. Change the arrangement, and the atoms form coal, diamond or fullerenes (5 of them).
There are three isotopes of hydrogen: hydrogen, deuterium, and tritium. They each have one proton but differ in the number of their neutrons. Hydrogen has 0 neutrons, deuterium 1, and tritium 2. The isotopes of hydrogen have, respectively, mass numbers of 1, 2 and 3 (ignoring the electron mass, which is about 1/1472).
More Info:
www.rsc.org
What are your thoughts on this subject?
8 Comments
Plums
What a really random question..you would have to be a scientist to answer this one!! Which I am clearly not!!
Stevie G
Poor question and explanation that varies numerical numbers.
rkcorrigan
No where in the description of the correct answer is the correct answer itself. Again, the user is left to “do the math”.
Dennis Walker
Not my strongest topic I wasn’t smart enough to handle this question and the majority only just scraped in by a small margin.
Jerry Edwards
Plums,
Or observant.
The picture has 12.01.07.
I took a chance with 12 - 7.
David Ching
Actually, there is Carbon 8 to Carbon 22, although most only exist under laboratory conditions. This is an unfair question, as there are many opinions as to what an allotrope actually is - constant or temporary. Four is the normally accepted number for carbon.
Richard Hoff
Even the scientists don't have a handle on how many allotropes carbon has.
Richard Hoff
Even the scientists don't have a handle how many has allotropes carbon.