Why would fluorine, chlorine, and bromine be placed in the same group (the halogens) in the periodic table of elements? (1 point) they have similar names. they all react with the noble gases. they all exist as gases at room temperature. they share similar chemical properties.

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Which of the following is not an assumption that scientists must make about the natural world? a. regularity b. causality c. predictability d. plausibility

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.