Why are the halogen elements so dangerous in their uncombined forms?

The specific heat of ice is 0.5 calories/gram°c. 20 grams of ice will require ll calories to raise the temperature 1°c. 05

Analyze how the water cycle affects a food web. now list 3 examples for each below using complete sentences, on how too much water would affect the same web? how about to little water?

Pulmonary arteries carry highly oxygenated blood. true or false?