What do plant cells need chloroplasts?

Chloroplasts are needed for photosynthesis. And it is known as kitchen of the leaf.

Explanation: Chloroplasts is needed in plants because the chloroplasts contain chlorophyll which helps the plants for photosynthesis i.e. in the manufacture of food. It is said that chloroplasts are the kitchen of the leaf.

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