Please answer quickly and fill in the blanks. Determine which type of property each statement describes by typing “physical” or “chemical” in the blank.

Hydrogen is a colorless, tasteless, and odorless gas.


Hydrogen is very combustible in the presence of oxygen.


Hydrogen is very reactive with most elements.


Hydrogen is the least dense of all elements.

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.

hypostyle hall;

window cleaner is ammonia dissolved in water. this is an example of a