A:______、________、__________.
H:______、________、__________.
a:______、________、__________.
g:______、________、__________.
网友回答
A:__Al____、__Ag______、___Ar_______.
H:___H___、___Hg_____、____He______.
a:___Ca___、___Na_____、____Ba______.
g:__Mg____、____Ag____、____Hg______.