5 Written questions
5 Matching questions
- Choose 2 elements essential to life, draw the electron configuration of each as an ion and note the charge of the ion.
- What is a molecule?
- What are isotopes?
- What is a hydrogen bond? Strong or weak?
- What are our 6 Essential Elements?
- a 2 or more atoms held together by covalent bonds
- b CHNOPS: Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur
- c Ex: O - only 6 rings on outer shell, so it wants to gain 2, making it 2- charge
- d Different forms of the same element; they differ in number of neutrons, but they have the same # of protons and behave identically in chemical reactions
- e Partial plus of a Hydrogen in a polar molecule forms a bond with a Partial Minus of another polar molecule; Weak bond.
5 Multiple choice questions
- The sharing of electrons EQUALLY; atoms have similar electronegativities
- A compound has characteristics different from those of its elements. Table salt, for example, is sodium chloride (NaCl), a compound composed of the elements sodium (Na) and chlorine (Cl) in a 1:1 ratio. Pure sodium is a metal, and pure chlorine is a poisonous gas. When chemically combined, however, sodium and chlorine form an edible compound.
- Potential energy - stored energy due to location or structure; ready to use energy
Kinetic energy - energy in motion or movement; currently using
- First shell - 2
Second shell - 8
Third shell - 8
- A substance that cannot be broken down to other substances by chemical reactions.
5 True/False questions
What are polar covalent bonds? → The sharing of electrons UNEQUALLY; atoms have differing electronegativities
What are the two strong chemical bonds? → Atoms interacting with each other to share, take, or give electrons.
What is matter? → Anything that takes up space and has mass. Ex: Air; something that isn't matter: light (think of the filling up a balloon metaphor)
What are covalent bonds? Single? Double? → The electrons on the outermost orbital shell
Difference between covalent and ionic bonds? → Covalent bonds are the SHARING of electrons, whether it be equally or unequally
Ionic bonds are the GAINING or LOSING of electrons, NOT SHARING