Group 0,1,7 Elements Flashcards
(25 cards)
What is Group 1 called?
The Alkali Metals.
What are examples of Group 1 elements?
Lithium, sodium, potassium, rubidium, caesium, francium.
What is a key physical property of Group 1 metals?
They are soft and can be cut with a knife.
What happens to reactivity as you go down Group 1?
Reactivity increases.
What is produced when Group 1 metals react with water?
A metal hydroxide and hydrogen gas.
What is the word equation for sodium reacting with water?
Sodium + Water → Sodium hydroxide + Hydrogen.
What is observed when potassium reacts with water?
It melts, fizzes, and ignites with a lilac flame.
Why do Group 1 metals become more reactive down the group?
Outer electron is further from nucleus and more easily lost.
What ions do Group 1 metals form?
+1 ions.
What is Group 7 called?
The Halogens.
What are examples of Group 7 elements?
Fluorine, chlorine, bromine, iodine, astatine.
What happens to reactivity as you go down Group 7?
Reactivity decreases.
What are the physical states of halogens at room temperature?
Fluorine – gas, Chlorine – gas, Bromine – liquid, Iodine – solid.
What is a displacement reaction in Group 7?
A more reactive halogen displaces a less reactive one from a compound.
What is the word equation for chlorine displacing bromine?
Chlorine + Potassium bromide → Potassium chloride + Bromine.
Why do halogens become less reactive down the group?
Harder to gain an extra electron as atomic radius increases.
What ions do halogens form?
-1 ions (halide ions).
What is Group 0 called?
The Noble Gases.
What are examples of noble gases?
Helium, neon, argon, krypton, xenon, radon.
What is the key property of noble gases?
They are unreactive due to full outer electron shells.
What are noble gases used for?
Helium – balloons, Argon – light bulbs, Neon – signs.
What happens to boiling points down Group 0?
Boiling points increase.
Why do boiling points increase down Group 0?
Because atoms get larger and intermolecular forces become stronger.
Do noble gases form compounds easily?
No – they are chemically inert.
