hydrogen
→
IsA
→
the fuel
|
0.70
|
|
hydrogen
→
IsA
→
gas
|
0.65
|
|
hydrogen
→
IsA
→
the most abundant element
|
0.47
|
|
hydrogen
→
IsA
→
the most common element
|
0.46
|
|
hydrogen
→
IsA
→
element
|
0.44
|
|
hydrogen
→
IsA
→
the lightest element
|
0.44
|
|
hydrogen
→
IsA
→
primary fuel
|
0.34
|
|
hydrogen
→
IsA
→
the simplest element
|
0.34
|
|
hydrogen
→
IsA
→
perfect fuel
|
0.30
|
|
hydrogen
→
IsA
→
excellent fuel
|
0.28
|
|
hydrogen
→
IsA
→
a group 1 element
|
0.25
|
|
hydrogen
→
IsA
→
integral element
|
0.25
|
|
hydrogen
→
IsA
→
just one element
|
0.25
|
|
hydrogen
→
IsA
→
potent greenhouse gas
|
0.25
|
|
hydrogen
→
IsA
→
volatile colourless gas
|
0.25
|
|
hydrogen
→
IsA
→
alternative fuel
|
0.25
|
|
hydrogen
→
IsA
→
the smallest and lightest eleme…
|
0.23
|
|
hydrogen
→
IsA
→
key element
|
0.22
|
|
hydrogen
→
IsA
→
comparatively safe fuel
|
0.16
|
|