In mitosis, chromatids line up in the middle of the cell during prophase metaphase anaphase telophase

The answer is metaphase. :D this is when they line up

In mitosis, chromatids line up in the middle of the Cell during Metaphase.

C) reflection (i also looked up the other choices just to make sure)

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass