What happens when a reversible reaction starts to take place in a closed system? Select all that apply.
The rate of the forward reaction is at its maximum when the reaction first starts.
The rate of the forward reaction starts at zero and increases throughout the reaction.
The rate of the reverse reaction increases as the concentration of products increases
The reactions will continue until both reach a rate of zero and all chemical reactions stop.
The rate of the reverse reaction starts to decrease as the concentration of products increases.
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im doing the test rn i will let you know in a bit

Explanation:

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

b) solid

its a type of rock

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.