Using the picture below, calculate the number of protons, electrons, and neutrons

4 protons.

5 neutrons.

4 electrons.

Explanation:

Your # of protons will always be the atomic number (number above the symbol), which is 4.

Your # of neutrons will always be the atomic mass minus atomic number, which is 5.

Your # of electrons is also equal to the atomic number. It is also 4.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.