Atomic Models & History
His atomic model described atoms as indivisible particles.
Who is John Dalton?
Helium
2 p+
2 e-
2 n0
These properties can be determined using your senses and measurements.
What are physical properties?
An oxidizing hazard would have this GHS symbol.(Draw picture)
Flame over circle with Diamond frame
Krypton has this many protons.
What is 39 protons?
Using his discovery of the electron, JJ Thomson's atomic model, nicknamed this, embedded negative electrons within a positive sphere.
Boron
5 p+
5 e-
6 n0
Evidence of these properties might include the production of bubbles, heat, or unexpected colour changes.
What are chemical properties?
A can of hairspray might have this HHPS symbol. (name and symbol)
What is Explosive?
Identify and count the atoms of this molecule:
CH3COOH
Carbon - 2 atoms
Hydrogen - 4 atoms
Oxygen - 2 atoms
He discovered that the nucleus was made up of positive and neutral particles called protons and neutrons.
James Chadwick
Chlorine
17 p+
17 e-
18 n0
A description of Oxygen as a odorless, colourless gas highlights these properties.
What are the physical properties of state, odour, and colour?
WHMIS stands for this.
What is Workplace Hazardous Materials Information System?
An atom of Yttrium would have this many neutrons.
What is 50 neutrons?
Nicknamed the 'planetary model', Niels Bohr updated the atomic model by placing electrons here.
What are orbitals (shells)?
Calcium
20 p+
20 e-
20 n0
Sugar dissolving in water is an example of this property (type and category).
What is Physical - Solubility?
The only original WHMIS symbol, this hazard would be found on a sample of Bordella pertussis - the organism which causes whooping cough. (symbol and name)
What are Biohazardous Infectious Materials?
A sulfur ion with a charge of -2 will have this many electrons.
What is 18 electrons?
Ernest Rutherford showed that positive charges are centralized in the nucleus with this experiment.
What is the Gold Foil Experiment?
Phosphorus Ion
15 p+
18 e-
16 n0
Charge of -3Elements in this family/group are very reactive with water and react with oxygen to form alkaline substances.
What are the Alkali Metals?
These five hazards would be classified as Physical Hazards.
What are Explosives, Flammable Liquids, Oxidizing Liquids, Compressed Gases, and Corrosives?
Identify and count the atoms of this molecule:
2 (NH4)2Cr2O7
Nitrogen - 4 atoms
Hydrogen - 16 atoms
Chromium - 4 atoms
Oxygen - 14 atoms