What is water gas ? give its two preparation

answer:

Explanation:

A mixture of carbon monoxide and hydrogen gas is commonly known as water gas. [ CO + H2] ® water gas. It is used as a fuel. PREPARATION: It is prepared by passing steam over red hot coke.

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.