What does magnesium carbonate and hydrochloric acid make?

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?

Is of of 3- ? a. 1--3- b. 1--2- c. 1--3- d. of

How many moles are in 1.26*10^24 particles in significant figures