The division of Earth’s history into smaller units makes up the .

geologic time scale

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Explanation:

you should have answer choices right believe me it is B

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.