Chemical Bonding (HSC SSCE Chemistry): Flashcards
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How ionic substances form
How ionic substances form
Metals transfer electrons to non-metals, forming charged ions
Bonding in covalent molecular substances
Bonding in covalent molecular substances
Atoms share electrons to form covalent bonds
Melting point of ionic substances
Melting point of ionic substances
High, typically > 400°C
Boiling point of covalent molecular substances
Boiling point of covalent molecular substances
Low, generally < 400°C
Hardness property of ionic substances
Hardness property of ionic substances
Hard and brittle
Electrical conductivity of molten ionic substances
Electrical conductivity of molten ionic substances
Conducts electricity
Electrical conductivity of covalent molecular substances
Electrical conductivity of covalent molecular substances
Does not conduct
Why ionic substances have high melting points
Why ionic substances have high melting points
Strong electrostatic forces require large energy to overcome
Intermolecular forces
Intermolecular forces
Weak attractive forces between separate molecules
What breaks when covalent substances melt/boil
What breaks when covalent substances melt/boil
Weak intermolecular forces; covalent bonds remain intact