1. __NaCI + __F2=__NaF + __CI2 2. __NaBr + __H3PO4=__HBr + __Na3PO4 3. __H2 + __O2= __H2O
4. __Ca + __H2O= __Ca(OH)2 + __H2
5. __H2 + __N2= __NH3
6. __Al2O3= __Al + __O2
7. __Ca + __F2= __CaF2

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?

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

Select all that apply. using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 (s) pb+2(aq) + 2cl -(aq). the concentration of the products yield a ksp of 2.1 x 10-2: