Draw Lewis structures of molecules
Grade 10 Science Worksheet
Circle the best answer, or write your answer on the line.
CO₂ has 16 valence electrons. After drawing 2 single bonds, O–C–O, how many electrons are left to place, Ari?
H₂O has 8 valence electrons. After drawing 2 single bonds to hydrogen, how many electrons are left to place, Bo?
NH₃ has 8 valence electrons. After drawing 3 single bonds to hydrogen, how many electrons are left to place, Esme?
How many shared pairs make a double bond, Jun?
- One
- Four
- Two
How are the oxygens joined to carbon in CO₂, Kira?
- By a single bond each
- By a double bond each
- By one shared triple bond
Why is hydrogen never the central atom, Milo?
- It is the heaviest
- It forms one bond
- It has eight electrons
After drawing the single bonds, what comes next, Noah?
- Add lone pairs to reach octets
- Remove a hydrogen
- Stop: bonds alone give octets
Which atom goes in the middle of CO₂, Pia?
- Carbon
- Oxygen
- Neither
On the card, how many lone pairs does nitrogen in NH₃ have, Ren?
- One
- Zero
- Three
On the card, which molecule has no lone pairs, Zee?
Use the picture in question 9.
- CH₄
- NH₃
- H₂O