halogens Flashcards by Maryam Ilyasova | Brainscape

Q

in water

A

cl pale green
br orange
i red/brown

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Q

cyclohexane

A

cl pale green
br orange
i purple

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Q

displacement equations

A

2NaBr + Cl2 —> 2NaCl + Br2

NaI + Br2 —> NaBr + I2

NaI + Cl2 —> NaCl + I2

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Q

reactivity trend of group 7 elements

A

decreases as you go down
look down: atomic radius of atoms increases
distance between + charged nucleus and outer (- charged) electrons increases (more electron shells added)
force of attraction between protons in nucleus and outer shell electrons decreases
with more added shells shielding of electrons from nucleus increases
-harder for atoms to gain electrons to outer shells

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