A student observes a model of two bonded atoms. She is told that both atoms are nonmetals. Which of the following is a valid conclusion? A. The student is looking at a model of atoms held together by a covalent bond.

B. The student is looking at a model of a metalloid.

C. The student is looking at a model of a crystal lattice.

D. The student is looking at a model of atoms held together by an ionic bond.

Intro: a solid ball of radius rb has a uniform charge density ρ. part a: what is the magnitude of the electric field e(r) at a distance r> rb from the center of the ball? express your answer in terms of ρ, rb, r, and ϵ0. part b: what is the magnitude of the electric field e(r) at a distance r express your answer in terms of ρ, rb, r, and ϵ0. part c: let e(r) represent the electric field due to the charged ball throughout all of space. which of the following statements about the electric field are true? check all that apply. e(0) = 0 e(rb)=0 limr→∞e(r)=0 the maximum electric field occurs when r=0 the maximum electric field occurs when r=rb the maximum electric field occurs as r→∞.