Chlorine is a gas, bromine is a liquid, and iodine is a solid because of differences in the strength of their
a. hydrogen bonds.
b. dispersion forces.
c. dipole interactions.
d. polar bonds.

The London dispersion forces become progressively stronger. At a low enough temperature the molecules will all be solids. At a high enough temperature they will all be gases. It is only at temperatures between -7 °C and 59 °C that fluorine and chlorine are gases, bromine is a solid, and iodine is a solid

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with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence