How can there be more than 1,000 different atoms when there are only about 100 different elements?

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

Acrystal that absorvd water from air is (blank)a. aqueousb. homogenousc. hygroscopicd. efflorescent

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?