How is a cation formed and which elements tend to become these in reactions?

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

Select the correct lewis structure for fluorine which is group 7a element?

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?