The picture above shows the Moon in the night sky over the course of a few weeks. The Moon goes from a new Moon, during which it is completely dark, to a full Moon, during which it is completely bright. When the bright part of the Moon is getting larger, like in the picture, the Moon is A. waxing. B. shrinking. C. waning. D. eclipsing.

your picture is not part of the scientific method.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.