D: Which of the following best describes how ionic radius changes across the periodic table?
A It increases as you move down a group.
B It increases as you move up a group.
C It increases from left to right across a period.
D There is no identifiable pattern.

Ci think not

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom

Aconductor easily transfer heat