Chapter 2, pt. 2 Homework
Introductory Biology
Name __________________________
Define the following
Polar covalent bond
Nonpolar covalent
Ionic bond
Ion
isotope
electronegativity
1. Beryllium has 4 protons, 5 neutrons, and 4 electrons. Diagram the position of these components
3. Show the relative position of the ionic, polar and non-polar bonds on the following line:
No charge
charged
4. How can you distinguish between an ion and an isotope?
5. List and describe two uses of isotopes
6. Draw the Bohr models of the following atoms.
Calcium, atomic number 20
Magnesium, atomic number 12
Nitrogen, atomic number 7
Chlorine, atomic number 17
Silicon, atomic number 14
7. Draw the Bohr model of a Mg4+ion (atomic number 12) and a Si3- ion (atomic number 14)
8. What does salt consist of? Draw the Bohr model for this molecule.
9. Draw the Bohr model and describe the bond formed for each of the following: two fluorine atoms (F2)
hydrogen fluoride (HF), water(H2O)