Vocabulary for Atoms and Molecules (Ch 2)

Matter =

Mass =

Element =

Compound =

Atoms =

Molecules =

Protons =

Neutrons =

Electrons =

Atomic nucleus =

Atomic number =

Mass number =

Atomic mass =

Isotopes =

Energy =

Potential Energy =

Electron Shell =

Valence electrons (and valence shell) =

Covalent Bond (single and double) =

Ionic Bond =

Hydrogen Bond =

Ions (cations and anions) =

Electronegativity =

Polar vs. Nonpolar =

Chemical equation =

Reactants =

Products =

Study Questions for Atoms and Molecules

In addition to these study questions, study the chemistry worksheet that you will find in this module.

Be able to read and write structural formulas for any given atom. For example, if I had one carbon atom, one oxygen atom, and two hydrogen atoms, how do I write the structural formula? If you see the structural formula 2H₂O₂, how many of each type of atom are there?

What are trace elements? Can you name a few trace elements?

What makes something a compound? What makes something a molecule? Can a compound also be a molecule? Are all compounds molecules?

What happens if you change the number of protons in an atom? What about the number of neutrons? Electrons?

What are the 4 most important elements for life, which make up ~96% of living matter?

Can you identify the reactants and products in a given chemical reaction?

List these in order from strongest to weakest: Ionic bonds, Covalent bonds, and Hydrogen bonds.

What are some major differences between ionic, covalent, and hydrogen bonds? If you are given the name of a compound and a periodic table, can you figure out what kind of bond the compound has?

What makes a molecule polar or nonpolar? If a molecule is composed of any of the elements in ONCH, you should be able to tell if it's polar or nonpolar just by looking at it.