Which two elements will be the most alike and why?
a. helium (he) and hydrogen (h)
b. oxygen (o) and neon (ne)
c. lithium (li) and sodium (na)

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

Figure 9 on page 362 shows various motions of balls. the curved path followed by the yellow ball in b in picture b is result of a) inertia b) centripetal motion c) gravity and horizontal velocity d) linear motion

What are the factors that affect the resistance of a wire?