Bonding & Substance Properties (AQA GCSE Chemistry Combined Science): Flashcards
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Practise the cards
12 cards from this deck
What are small molecules?
What are small molecules?
Atoms joined together by covalent bonds
No. of atoms in small molecules
No. of atoms in small molecules
2-20 atoms
What dot-and-cross diagrams (with shells) show
What dot-and-cross diagrams (with shells) show
Bonding electrons, lone pairs, electron shells
What 2D diagrams show
What 2D diagrams show
Covalent bonds as lines between atoms
What ball and stick models show
What ball and stick models show
3D arrangement of atoms and bonds
Why small molecules have low melting/boiling points
Why small molecules have low melting/boiling points
Weak intermolecular forces between molecules
State of small molecules at room temperature
State of small molecules at room temperature
Usually gases or liquids
Why small molecules don't conduct electricity
Why small molecules don't conduct electricity
No overall electric charge
Strength of covalent bonds within molecules
Strength of covalent bonds within molecules
Strong
Strength of intermolecular forces
Strength of intermolecular forces
Weak
How molecule size affects intermolecular forces
How molecule size affects intermolecular forces
Larger molecules have stronger intermolecular forces
Common small molecule examples
Common small molecule examples
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