Answer:
Volcanoes change the earth's surface by allowing molten rock, or magma, to escape the earth and create rock formations or mountains.
Explanation:
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The most brittle one is selenium!
Chemistry plays a large role in obstetrics and gynecology. For instance, urinalysis requires an understanding of bilirubin levels and their conjugation with glucuronic acid to create a water-soluble. This is passed through the bloodstream and urinary system to create urobilirubin.
Se02 is the formula for selenium dioxide, hope this helped.
Same number of protons but different number if neutrons.