Periodicity (OCR A-Level Chemistry A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Which elements are classified as semi-metals or metalloids?
Which elements are classified as semi-metals or metalloids?
B, Si, Ge, As, Sb
What happens to outer-shell electrons in metallic bonding?
What happens to outer-shell electrons in metallic bonding?
They become delocalised
In which states can metals conduct electricity?
In which states can metals conduct electricity?
Both solid and liquid states
What is the melting point of tungsten?
What is the melting point of tungsten?
3422°C
What is the bond angle in diamond's tetrahedral structure?
What is the bond angle in diamond's tetrahedral structure?
Why don't diamond and silicon conduct electricity?
Why don't diamond and silicon conduct electricity?
All 4 outer electrons in covalent bonds
How many of carbon's outer electrons form covalent bonds in graphene?
How many of carbon's outer electrons form covalent bonds in graphene?
3 electrons
What forces hold the layers together in graphite?
What forces hold the layers together in graphite?
Weak London forces
Between which groups does melting point show a sharp decrease across periods?
Between which groups does melting point show a sharp decrease across periods?
Group 14 and Group 15
Approximately how many metals exist compared to non-metals?
Approximately how many metals exist compared to non-metals?
92 metals vs 22 non-metals