Draw Lewis structures of molecules
Grade 10 Science Worksheet - Building Confidence
Circle the best answer, or write your answer on the line.
Methane, CH₄, has 1 carbon atom with 4 valence electrons and 4 hydrogen atoms with 1 each. How many valence electrons in all, Ari?
Ammonia, NH₃, has 1 nitrogen atom with 5 valence electrons and 3 hydrogen atoms with 1 each. How many valence electrons in all, Bo?
Carbon dioxide, CO₂, has 1 carbon atom with 4 valence electrons and 2 oxygen atoms with 6 each. How many valence electrons in all, Esme?
On the card, how many lone pairs does the oxygen in H₂O have, Jun?
- Zero
- Four
- Two
On the card, what kind of bond joins the two atoms in O₂, Luz?
Use the picture in question 4.
- No bond
- A single bond
- A double bond
What does the octet rule say, Milo?
- Atoms tend to have 8 protons
- Molecules have 8 atoms
- Atoms tend to have 8 outer electrons
How many electrons does hydrogen need around it in a molecule, Noah?
- 4
- 8
- 2
How does nitrogen in NH₃ reach 8 electrons, Pia?
- 2 bonds and 2 lone pairs
- 4 bonds and no lone pairs
- 3 bonds and 1 lone pair
How many electrons does one line in a Lewis structure stand for, Ren?
- 8
- 2
- 1
What does a pair of dots on one atom show, Tala?
- A lone pair
- Two protons
- A shared bond