What property of matter allows convection currents to form? a. fluids rise if they are less dense than the matter around them. b. the molecules in solids do not vibrate very quickly. c. electromagnetic waves carry energy. d. liquids take the shape of their container.

Which type of bond is present in hydrogen sulfide (h2s)? the table of electronegativities is given. a. hydrogen b. ionic c. nonpolar covalent d. polar covalent

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?

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