chemistry

• Atomic Number is the number of protons in the nucleus of an atom
• Mass Number is the total number of protons plus neutrons in the nucleus or nucleon number
• Isotopes are atoms of the same element with the same atomic number (same number of protons and electrons), different atomic mass (different numbers of neutrons), and same chemical properties.
• Relative atomic mass is the average of all the stable isotopes of an element - considering the mass of each isotope and relative abundance. Measured relative to the isotope 12^C = 12 units.
• Monatomic gases (group 0/8) are He = Helium, Ne = Neon, Ar = Argon, Kr = Krypton, Xe = Xenon, and Rn = Radon.
• Diatomic gases are Hydrogen, Nitrogen, Fluorine, Oxygen, Iodine, Chlorine, Bromine, and Astatine.
• Water -> H2O
• Carbon Dioxide -> CO2
• Methane -> CH4
• Ammonia -> NH3
• Hydrochloric Acid -> HCl
• Sulfuric Acid -> H2SO4
• Nitric Acid -> HNO3
• Copper Carbonate -> CuCO3
• Copper Sulfate -> CuSO4
• Sodium Chloride -> NaCl
• Sodium Carbonate -> Na2CO3
• Sodium Hydroxide -> NaOH
• Magnesium Oxide -> MgO
• Hydroxide -> OH-
• Carbonate -> CO3 2-
• Hydrogencarbonate -> HCO3-
• Nitrate -> NO3-
• Sulfate -> SO4 2-
• Phosphate -> PO4 3-
• Ammonium -> NH4+
• Metallic Bonding is the electrostatic force of attraction between lattice metal positive ions and sea of delocalized electrons.
• Reactivity Series is related to the tendency of a metal to form positive ions illustrated by displacement reactions.
• Lithium produce a scarlet red flame color.
• Sodium produce a bright yellow flame color.
• Potassium produce a lilac flame color.
• Copper produce a blue-green flame color.
• Barium produce a pale green flame color.
• Calcium produce a brick red flame color.
• Strontium produce a crimson red flame color.
• Reactivity Series (most reactive to least reactive) is Potassium K, Sodium Na, Lithium Li, Calcium Ca, Magnesium Mg, Aluminium Al, Carbon C, Zinc Zn, Iron Fe, Tin Sn, Lead Pb, Hydrogen H, Copper Cu, Silver Ag, Gold Au.
• What is the name and meaning of this hazard symbol?

  • corrosive
  • attack and destroy living tissues, such as skin and eyes

  
• What is the name and meaning of this hazard symbol?

  • long term health hazard
  • substances that can attack organs in the body (cancer causing substances)

  
• What is the name and meaning of this hazard symbol?

  • poisonous
  • can cause death if swallowed, breathed in, or absorbed by skin

  
• What is the name and meaning of this hazard symbol?

  • irritant or harmful
  • not corrosive but will make the skin red and blister