The wavelength of a wave is defined as: a. the distance from crest to crest.
b. one-half the distance from crest to crest.
c. the distance between the highest and lowest parts of a wave.
d. how often a wave goes up and down.

what i s the question the wavelength of a wave defined as the distance between two crest or tough tthe answer is =A)the distance between crest to crest

cytokinesis is the splitting of a cell membrane to form 2 identical daughter cells. it's similar to mitosis as both cells have identical copies of dna and cytokinesis is a step in the mitotic cycle.

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.