All of the following are true for a catalyst except that it

a. provides an alternative pathway for a reaction.

b. increases the rate of a chemical reaction.

c. provides a lower required activation energy.

d. is consumed during a chemical reaction.

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?

Which of these conditions most likely produces an unstable isotope?

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