Express the pictured problem as a chemical equation.

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

How many neutrons does an element have if its atomic number is 50 and its mass number is 166

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table?