What characterizes a homogeneous mixture? a. the substances are identifiable in the mixture. b. the mixture has different consistencies. c. the substances are evenly distributed throughout. d. the mixture settles out when left standing.

A homogenous mixture is characterized by identical composition. 
So your answer is b!

If that helps make sure to mark brainliest
-procklownyt

the catch is that the top numbers are atomic masses the bottom numbers are the numbers of protons and electrons in an uncharged atom. they are the number of that atoms as you would find them on the periodic table. further, the numbers on the left are used to determine the missing numbers on the right

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

The answer is d for this question