What is the pH of a .000243 M solution of potassium hydroxide solution? Group of answer choices

3.61

12.97

10.39

1.03

Perform the following mathematical operations and report the answer to the appropriate number of significant figures 5.87998 + 3.100

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

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?