__1. Tiempo en que evolucionaron los reptiles. a. cenozoica
b. mesozoica
c. escala del tiempo geológico
d. eones
e. tiempo geológico
f. paleozoica
g. etapas del desarrollo de la tierra
h. precámbrico
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For each of the compounds below, show that the charges on the ions add up to zero. a. kbr b. cao c. li(2)o d. cacl(2) e. alcl(3)

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.