In this sixth step, you will measure the number and height of the plants in your quadrat at the end of week 3.
Click your quadrat to get a closer look.
How many blades of grass are there in your random
sample area?
Experimental Quadrat
Control Quadrat
Calculate the estimated number of blades in your
quadrat. Recall that nine wooden frames fit in a
quadrat.

the dissolution of polymer can be thermodynamically described in 2 steps.

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.