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Terms in this set (18)
What happens to the atomic radius as you go down the group?
Why does the atomic radius increase as you go down the group?
The atoms have more shells of electrons making the atom bigger
What happens to the melting point as you go down the group?
Why does the melting point decrease as you go down the group?
The metallic bond weakens as atomic size increases so the distance between the positive ions and delocalised electrons increases and therefore the electrostatic attractive forces between the ions weaken
Why is the outermost electron held more weakly?
They are successively further from the nucleus in additional shells
Why does the outermost electrons become more shielded?
They become more shielded from the attraction of the nucleus by the repulsive force of inner shell electrons
What does Mg burn with?
A bright flame
What is the equation for magnesium and oxygen?
2MgO +O2 -> 2MgO
Give a description of MgO
It is a white solid with a high melting point due to its ionic bonding
What will Mg ribbon often have?
A thin layer of of MgO on it formed by reaction with oxygen
What will Mg react slowly with?
What does the Mg ribbon need to be done before doing reactions?
It needs to be cleaned with emery paper
What happens if you do not clean the Mg ribbon with emery paper before reacting it with acid?
It will give a false result because both the Mg and MgO would react but at different rates
What are the products of magnesium and steam?
Magnesium oxide and hydrogen
What are the products of magnesium and warm water?
Magnesium hydroxide and hydrogen
What can the group 2 metals react with except for magnesium?
What are the observations of group 2 metals reacting with cold water?
They fizz more vigorously down the group, dissolves faster down the group, solution heats up more down the group and less claim precipitate forms down the group
Why is titanium a useful metal?
There are lots available, low density and it is corrosion resistive
THIS SET IS OFTEN IN FOLDERS WITH...
Periodicity and ionisation energy
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