How are all forms of asexual reproduction similiar?

They all involve one parent and they produce a offspring that will be genetically identical to the parent.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.