c3 Flashcards

1
Q

what is a covalent bond

A

-shared pair of electrons between two atoms - when non metals bond together.

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2
Q

describe the structure and properties of simple molecular covalent bonds

A
  • don’t conduct electricity (no ions)
  • small molecules
  • weak intermolecular forces : low melting and boiling points.
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3
Q

how do intermolecular forces change as the mass of the molecules increase

A

they increase causing the melting/boiling points to increase as well ( more energy needed to overcome these forces)

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4
Q

what are polymers

A

very large molecules with atoms linked by covalent bonds

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5
Q

what are giant covalent substances

A

solids - atoms covalently bonded together i a giant lattice
high melting/boiling points - strong covalents bonds.
-mostly don’t conduct electricity ( no delocalised electrons)
- diamond, graphite , silicon

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6
Q
A
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