Groups In The Perioudic Table Flashcards
Where are alkali metals located? What does this mean?
In group 1, this means that they have an electron in the outer shell and are very reactive.
What happens when you go down the group?
There are more shells so the force of attraction is weaker meaning that they are more reactive as the outer electron isn’t as secure.
What happens when alkali metals react with water?
It produces hydrogen gas and hydroxide of a metal. It reacts vigorously usually fizzing.
What group are halogens in? What does this mean?
They are located in group 7. They have 7 electrons in its outer shell and exist as a pair.
What happens when you go down the group?
The shells increase so there is less forces of attraction meaning that halogens can’t attract as many electrons so the reactivity decreases. Also the melting and boiling points increase.
what are metal halides?
They are the product of when halogens have reacted with metals forming a salt.
What can hydrogen also react with?
Halogens can react with hydrogen to form an hydrogen halides, they are soluble and they can dissolve in water and form acidic solutions.
What is a halogen displacement reaction?
It is redox reaction where the halogens gain and halides lose electrons. The more reactive compound pushes out the least eg. Chlorine + potassium bromide –> potassium chloride + bromine
Where are noble gases located? What does this mean?
In group 0(/8), they have 8 electrons on the outer shel, are inert, colourless and are monatomic.
What happens when you go down the group?
Density, Boiling and melting points all increase.
