Groups In The periodic table Flashcards
What is group 1?
Alkali metals
How many electrons does an alkali metal have on its outer shell?
One, so they have similar chemical properties
What are the physical properties of alkali metals
Low melting and boiling points and very soft
Why do alkali metals form ionic compounds not covalent bonds?
Alkali metals lose their single out electrons so easily that sharing it is out of the question so they don’t form covalent bonds
What happens to reactivity as you go down the alkali metals?
They become more reactive Because the outer electron is more easily lost as it is further away from the nucleus
What’s the alkali metals create when put in water?
Hydrogen gas and a hydroxide
What is group 7?
halogens
What do you halogens exist as?
Diatomic molecules, sharing one pair of electrons in a covalent bond which gives them both a full outer shell.
What happens as you go down group 7?
The melting points and boiling points of the halogens increase
What is chlorine like at room temperature?
Reactive poisonous and it’s green
What is brimming like at room temperature
It is poisonous and a red or brown liquid which gives off an orange vapour room temperature
What are iodine like a room temperature
It is a dark grey crystalline solid which gives off a purple paper when heated
What is the test for chlorine?
Holding a piece of damp blue litmus paper over it chlorine bleach the litmus paper turning it white and it may also turn red for moment because it is an acid.
Happens every activity as you go down group 7
Decreases
What is a displacement reaction?
When a more reactive metal takes the place of a less reactive metal
