Consider the nuclear equation below.
222 rn —> 218 po + he
which is the missing value that will balance the equation?
84
86
ooo

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock