Iron-rich minerals in rock pointed in one direction and then switched to the exact opposite direction this supports what idea?

Which of the following is true about the speed of light? it depends on the wavelength.

Calculate the concentration of all species in a 0.165 m solution of h2co3.

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?