Orbitals
What shape is an s orbital?
Sphere/ Spherical
Balance: H₂ + O₂ → H₂O
2H₂ + O₂ → 2H₂O
What is the oxidation number of oxygen in most compounds?
−2 (Unless you have a peroxide, superoxide, or bonded with Fluorine)
Name NH₄⁺
Ammonium
Convert 4500 into scientific notation
4.5 × 10³
Which orbital begins at the second energy level: s, p, d, or f?
p orbital (s-1, p-2, d-3, f-4)
Balance: N₂ + H₂ → NH₃
N₂ + 3H₂ → 2NH₃
Oxidation or Redox reaction?
Fe + O₂ → Fe₂O₃
Redox
What is the formula for nitrate?
NO₃⁻
Convert 3.2 × 10⁻⁴ into standard notation
0.00032
How many electrons can a p orbital hold total?
6 Electrons (s-2e, p-6e, d-10e, f-14e)
Balance: C₃H₈ + O₂ → CO₂ + H₂O
Answer: C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
In 2Mg + O₂ → 2MgO, which substance is oxidized?
Magnesium (Mg)
What is the charge of sulfate?
−2 (SO4-2)
Write the answer in scientific notation:
(2 × 10³)(3 × 10²)
6 × 10⁵
Write the electron configuration for oxygen.
1s² 2s² 2p⁴
Balance: FeCl₃ + NaOH → Fe(OH)₃ + NaCl
FeCl₃ + 3NaOH → Fe(OH)₃ + 3NaCl
In Zn + CuSO₄ → ZnSO₄ + Cu, what is the reducing agent?
Zinc (Zn)
In Zn + CuSO₄ → ZnSO₄ + Cu, what is the reducing agent?
Zinc (Zn)
Write the answer in scientific notation:
(4 × 10⁵) + (2 × 10⁴)
4.2 × 10⁵