5 Written Questions
5 Matching Questions
- Are Van der Waals interactions weak or strong?
- What is electronegativity?
- What is an element?
- What is a molecule?
- What is a chemical reaction? Be able to identify the products and reactants in a chemical reaction.
- a 2 or more atoms held together by covalent bonds
- b One atom's attraction of the electrons within one covalently bonded molecule
O > N > C > H
Oxygen - most electronegative element
- c The making and breaking of chemical bonds.
1. Reactants - structure of chemicals prior to a chemical reaction
3. Products - structure of chemicals as a result of a chemical reaction
- d Weak.
- e A substance that cannot be broken down to other substances by chemical reactions.
5 Multiple Choice Questions
- Two or more atoms SHARING ELECTRONS.
Single covalent bonds - sharing of one pair of valence electrons
Double - sharing of two pairs of valence electrons
- Non-polar covalent bond; they have equal electronegativity so they share their e⁻
- The sharing of electrons UNEQUALLY; atoms have differing electronegativities
- Elements required by organisms in minute quantities; ex: humans need iodine in small quantities or we'll get goiter
- Partial plus of a Hydrogen in a polar molecule forms a bond with a Partial Minus of another polar molecule; Weak bond.
5 True/False Questions
What are ionic bonds? → Electron gaining or losing; e⁻ TRANSFER (NOT SHARING) between two atoms
Define Subatomic particles, their charges, where they're found, and their relative mass. → Potential energy - stored energy due to location or structure; ready to use energy
Kinetic energy - energy in motion or movement; currently using
Difference between covalent and ionic bonds? → Compound is a mixture of at least two different elements, while a molecule is a 2 or more atoms of a single element.
What is the atomic number? → The number of protons in an atom.
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)