Group 7 Elements Flashcards
What is another name for the group 7 elements?
Halogens (salt makers)
What is the trend in boiling points as you go down group 7.
They increase
Which halogens are gasses at room temperature?
Chlorine and fluorine
Which group 7 element is liquid t room temperature?
Bromine
Which group 7 elements are solid at room temperature?
Iodine and astatine
What is the trend in colour as you go down group 7.
They get darker:
F2-Pale yellow
Cl2- Green
Br2- brown/orange
Iodine- grey
Astatine- black
Why do group 7 elements get less reactive a you go down the groups?
Fluorine’s outer shell is very close to the nucleus so it attracts electrons from other atoms very strongly to gain electrons and fill its outer shell. Moving down the group the outer shell is further away form the nucleus so there is less attractions and therefore harder to gain electrons from other atoms.
