Download physicalscience

Physical Science
Procedures
1. In the space provided below, draw electron-dot diagrams for the following atoms: nitrogran (N),
hydrogen (H), oxygen (O), and carbon (C).
2.nitrogen
hydrogen
oxygen
carbon
3.
4.
2. In the space provided below, draw electron-dot diagrams for the following molecules: hydrogen (H2),
ammonia (NH3), and methane (CH4). Remember that the dots represent the valence electrons. Make
sure that each atom in the molecules have 8 valence electrons, except hydrogen, which has only 2.
hydrogen
ammonia
methane
3.
a. Draw the structural formula for a hydrogen molecule (H2) and an oxygen molecule (O2).
Remember that each line represents an electron pair being shared.
hydrogen
oxygen
b. The oxygen atoms in carbon dioxide (CO2) form double bonds with the carbon atom,
forming a linear molecule. Draw the structural formula for carbon dioxide. The lines
should be placed at the correct bond angles.
Carbon dioxide
© 2011 Connections Academy, LLC. All Rights Reserved
4. Sketch space-filling models of a hydrogen molecule (H2) and carbon dioxide (CO2)..
hydrogen
Carbon dioxide
Analysis
1. What is the bond angle between the hydrogen atoms in an ammonia (NH3) molecule? _______
2. What is the bond angle between the oxygen atoms in the carbon dioxide molecule? ________
3. What is the molecular geometry of a methane (CH4) molecule? ________________________
© 2011 Connections Academy, LLC. All Rights Reserved