The symbol that means a substance is a gas is

(g).

That is the symbol typically put next to elements as a subscript to indicate that an element is a gas.

For instance, H2(g).

Symbols vary for other states of matter and etc.

Hope this helps!

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.

2b2t

explanation:

2b2t