It is very dangerous to humans.
Uncombined hydrogen is found in atmosphere in small concentration.
Halogens are unique because they are very reactive non-metals. "Halogens" is a Greek word meaning salt producers.
No. The halogens are fluorine, chlorine, bromine, iodine, and astatine.
Halogens have highreactivity.
The reactivity of halogens decreases down the group, which means Fluorine is the most reactive halogens as it is the most electronegative elements among the halogens, and also the Periodic Table.
Yes they are - they are all toxic and corrosive.
Halogens are found in nature as a monatomic species ex. Hydrogen, Nitrogen, Oxygen, Flourine, Chlorine, Bromine, ect.
Uncombined
is hydrogen uncombined in nature
Uncombined hydrogen is found in atmosphere in small concentration.
They are very reactive.They cannot be found uncombined.
Sodium is very reactive and this is the cause for which there doesn't exist uncombined in nature.
They are dangerous because in their uncombined forms they are highly reactive. Hope this helped ^,..,^
because it is
Group 17 (known as Halogens)
Zero.
no