5 Written questions
5 Matching questions
- Define the potential energy level of electrons and the Kinetic energy level.
- How many electrons does it take to fill the first orbital shell? The second? The third?
- Difference between compound and molecule?
- Difference between an element and a compound?
- What is a hydrogen bond? Strong or weak?
- a 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.
- b First shell - 2
Second shell - 8
Third shell - 8
- c Partial plus of a Hydrogen in a polar molecule forms a bond with a Partial Minus of another polar molecule; Weak bond.
- d Compound is a mixture of at least two different elements, while a molecule is a 2 or more atoms of a single element.
- e Potential energy - stored energy due to location or structure; ready to use energy
Kinetic energy - energy in motion or movement; currently using
5 Multiple choice questions
- 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
- Two or more atoms SHARING ELECTRONS.
Single covalent bonds - sharing of one pair of valence electrons
Double - sharing of two pairs of valence electrons
- CHNOPS: Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur
- Polar covalent bond.
(it's when there's more than one polar molecule that hydrogen bonding takes place)
- Atoms that lose or gain electrons to complete their outer shell
5 True/False questions
Are Van der Waals interactions weak or strong? → Weak.
What is an element? → Atoms that lose or gain electrons to complete their outer shell
What are polar covalent bonds? → The sharing of electrons UNEQUALLY; atoms have differing electronegativities
What is the atomic number? → The number of protons in an atom.
Define Subatomic particles, their charges, where they're found, and their relative mass. → Protons - positive; in nucleus; 1 dalton (or amu)
Neutrons - neutral; in nucleus; 1 dalton (or amu)
Electrons - negative; found outside nucleus; 0 nothing