HELP PLEASE When ice changes into water, it is an example of a change. Also, when water changes into water vapor, it is an example of a change.

A. physical...physical

B. chemical...chemical

C. physical...chemical

D. chemical...physical

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.

i think it is true since you can test the answer and can use observations to complete it.