C4 Flashcards
What group are alkali metals in
group 1
What are the 3 main properities of alkali metals
- soft
- low densisty
- low melting points
How reactive are alkali metals
Very highly reactive
Which group one metals are most reactive
Metals further down the group
What happens to the properites of alkali metals as you go down the group
- melting point lowers
- boiling point lowers
Why are alkali metals so reactive?
- Because they only have one electron to lose to become stable
- 1 easier to lose than 3
Why are alkali metals more reactive futher down the group?
Because the 1 electron that has to be lost is further away from the atoms neucleous meaning yhat the electrostatic force of attraction is weaker as the period no. increaces making it more reacitve
What type of bond do group 1 atoms mostly create
ionic bonds with non metals
What are the common properties of ionic compounds using group 1 atoms
they are usually:
- white solids
- dissolve in water
- form colourless solutions
What happens to alkali metals when they react with water
- A rigorous reaction occours
(often sparks occour) - often the hydrogen gass is released it can ignite from the large amounts of energy
What are the products of alkali metals reacting with water
Metal hydroxide and hydrogen gass
What is produced when group 1 atoms react with chlorine gass
Chloride salts are produced
What are the properties of Chloride salts
made from group one metals
They are white
What is the product of group one metals reacting with oxygen?
Metal oxides
What can oxygen and lithium produce when reacted
Li2O
What products can sodium and oxygen produce
sodium oxide, Na2O or sodium peroxide, Na2O2
What products can potassium and oxygen produce
potassium peroxide, K2O2, or potassium superoxide, KO2.