Chemistry

• What is Electronegativity? Atoms ability to attract electrons
• What are the Three rules of Orbital diagrams?

  1. Aufbau Principle
  2. Hund's Rule
  3. Pauli Exclusion Principle
• Explain the Aufbau Principle:

  Electrons must fill the lowest energy orbitals first before moving to the higher orbitals
• Explain the Hund's Rule:

  Electrons must fill the orbitals singularly before pairing up.
• Explain the Pauli Exclusion Principle:

  Only two Electrons can pair up with opposite spins
• What are Isotopes?

  Isotopes are atoms with the same number of protons but a different number of neutrons.
• A mole of any substance is defined as 6.02x10^23 particles
• Molar Mass is equal to the Relative Atomic Mass (on the PT)
• Converting Mole to Particles: x6.02x10^23
• Converting Particles to Moles: ÷6.02x10^23
• Avogadros Number is 6.02x10^23
• Hydrolysis = Opposite reaction to neutralization
• What is the opposite reaction to neutralization?

  Hydrolysis
• What Dissociate (split up) completely (H+) in H2O and is One way reaction?

  Strong Acids
• Electromagnetic Radiation: A form of energy that propagates as both electrical & magnetic waves travelling in packets of energy.
• Emission Spectrum: Graphic representation of energy emitted when electrons are excited.
• Polyatomic Ions: A group of covalently bonded atoms
• What is Anion?

  Negatively charged ion.
• What is Atomic Number?

  The number of protons in an atom's nucleus.
• What is a Cation?

  A positively charged ion.
• What is an Electron Cloud?

  Region around the nucleus where electrons are likely to be found.
• What are Isotopes?

  Atoms of the same element with different numbers of neutrons.
• What is Bond Enthalpy?

  Energy required to break a chemical bond