1. define matter, elements, compounds.
2. 96% of life is made of what?
3. draw an atom with neutrons, protons, and electrons. indicate charge on each.
4. choose an element, identify it’s atomic #, mass #, and atomic mass
5. what is an isotope?
6. what are electron shells and orbitals?
7. what are valence electrons and how do they determine reactivity?
8. draw an example of a non-polar h-h and polar covalent bonds h2o.
9. explain electronegativity in water and draw how water could connect to other water molecules via hydrogen bonding.
10. explain how ionic bonds differ from covalent. what are cations an anions?
11. using an example demonstrate a reaction complete with reactants and products.
12. list the properties of water.
13. explain adhesion and cohesion in the example of water moving up a tree.
14. why does ice float?
15. what does it mean if something is hydrophobic or hydrophilic?
16. what are the products when two waters react, how does this relate to ph?
17. why is carbon so versatile?