What elements valence electrons are 5s^2 5p^4
a. te
b. mo
c. pm
d. re

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

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 is i fracture in the crust called when land move up, down or sideways