Which of the following is an example of a single replacement reaction 2Ag + S --> AG2S 2Ag + S --> AG, 2, S Zn + 2HCl --> ZnCl2 + H2 Zn + 2HCl --> ZnCl, 2, + H, 2 FeCl2 + Na2CO3 --> 2NaCl + H2O FeCl, 2, + Na2CO, 3, --> 2NaCl + H, 2, O 2H2O2 + 2H2O + O2

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

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?

When would a bouncy ball have the most potential energy