Trends in Groups Flashcards
(12 cards)
What happens to reactivity as you go down Group 7?
Reactivity decreases.
Why does reactivity decrease down Group 7?
Atoms get bigger; it’s harder to gain electrons.
What happens to boiling points down Group 7?
Boiling points increase.
What happens to melting points down Group 7?
Melting points increase.
What is a displacement reaction?
A more reactive halogen replaces a less reactive one in a compound.
Will chlorine displace iodine?
Yes — because chlorine is more reactive.
What happens to reactivity down Group 0?
They stay unreactive (inert).
Why are noble gases unreactive?
They have full outer electron shells.
What happens to boiling points down Group 0?
Boiling points increase.
What happens to melting points down Group 0?
Melting points increase.
Name a use for helium.
Used in balloons.
Why is argon used in light bulbs?
It prevents the filament from burning (inert gas).
