Typically, nitrogen atoms are composed of seven electrons, seven protons, and seven
neutrons. an isotope of nitrogen could
a. be negatively charged.
b. have more than seven electrons and more than seven protons.
c. have more than seven protons.
d. have more than seven neutrons.

d. have more than seven neutrons.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

the fossil record provides evidence of a common ancestor to many species.