At the center, 6 unmarked red balls are interspersed with 4 blue balls marked with plus signs. A green cloud with 2 concentric white lines surrounds the center, with 2 small green balls marked with minus signs on the inner white line and 2 small green balls marked with minus signs on the outer white line.

What value is closest to the mass of the atom?

a. 4 amu
b. 6 amu
c. 10 amu
d. 14 amu

The question provides information about the arrangement of red and blue balls, as well as the green cloud with concentric white lines and small green balls marked with minus signs.

However, there is no direct information given about the mass of the atom. The arrangement of balls and the green cloud are unrelated to the mass of the atom. Therefore, none of the given options (a, b, c, d) can be determined as the closest value to the mass of the atom based on the information provided.