Um átomo apresenta 13 prótons e 14 nêutrons. a carga do íon estável formado a partir desse átomo será:
a)-2
b)-1
c)+1
d)+2
e)+3

a resposta deu letra (e) não

Which of the following is not a true statement about dwarf planets? a the kuiper belt contains comets, asteroids, and dwarf planets. b ceres is a dwarf planet located in the kuiper belt. c the largest known dwarf planet in the solar system is named eris.

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

What can be found in the ionosphere