Select the correct answer. Identify Bohr's model of the atom. His model describes the reactivity of an element based on its number of valence electrons.

A- "A"
B-"B"
C- "C"
D- "D"

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory

An atomic nucleus is composed ofa)protons.b)protons and neutrons.c)protons and electrons.d)protons, neutrons, and electrons.

Alice did an experiment to find the relationship between the angle at which a ray of light strikes a mirror and the angle at which the mirror reflects the light. she placed a ray box in front of a mirror. she changed the angle at which the light from the ray box struck the mirror and noted the corresponding angle at which the mirror reflected the light. which of the following is the dependent variable in this experiment? the mirror used to reflect the light the ray box used as the source of light angle at which the light from the ray box strikes the mirror angle at which the mirror reflects the light from the ray box