5 Written questions
5 Matching questions
- What is an element?
- What is matter?
- What is a chemical bond?
- What is the atomic number?
- What is a hydrogen bond? Strong or weak?
- a A substance that cannot be broken down to other substances by chemical reactions.
- b The number of protons in an atom.
- c Partial plus of a Hydrogen in a polar molecule forms a bond with a Partial Minus of another polar molecule; Weak bond.
- d Anything that takes up space and has mass. Ex: Air; something that isn't matter: light (think of the filling up a balloon metaphor)
- e Atoms interacting with each other to share, take, or give electrons.
5 Multiple choice questions
- The electrons on the outermost orbital shell
- Two or more atoms SHARING ELECTRONS.
Single covalent bonds - sharing of one pair of valence electrons
Double - sharing of two pairs of valence electrons
- Atoms that lose or gain electrons to complete their outer shell
- 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
- 2 or more atoms held together by covalent bonds
5 True/False questions
Do Hydrogen Bonds only occur with water molecules? → No! Example: NH₃ (ammonia) is a hydrogen bond, the partial negative of Nitrogen bonds with the partial positive of Hydrogen.
Difference between an element and a compound? → 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.
What are isotopes? → 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
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
What is electronegativity? → The number of protons and neutrons in nucleus.