Chemistry Flashcards
The part of a lab where you summarize your findings
Conclusion
The part of the lab where you record your data
Observations
The part of the lab where you make an educated guess about what will happen
Hypothesis
The beginning of a lab
Purpose/question
The list of items you will need to complete your lab
Materials
A set of instruction you will need to follow to complete your lab
Procedure
What does WHMIS stand for?
Workplace Hazardous Materials Information System
What does HHPS stand for?
Hazardous Household product symbols
Define Physical Property
Observing a substance using your 5 senses and measuring instruments
Define Chemical Property
Characteristics of a material that you can see when a substance is reacted
Define Physical Change
A change in which no new substance is made
Define Chemical Change
A reaction that makes a new substance
What are the 5 evidences of chemical change?
1.Change in color
2. Bubbling
3. light/heat
4. Precipitation
5. Odor
Define Colour
What it looks like
Define Odour
How it smells
Texture
How it feels
Lustre
Ability to reflect light
Viscosity
Ability to flow
Hardness
Ability to be scratched
Clarity
The ability to allow light through it
Transparent - clear/see through
Translucent - foggy
Opaque - can’t see through it
Malleability
Can be bent or hammered into shapes
Ductility
Can be pulled into wires
Corrosive
Causes damage by a chemical reaction
Flammable
Can burn or ignite easily
Reactive
Change easily or vigorously when in contact with other substance
The Billiard Ball model - envisioned the atom as a tiny indestructible sphere
Dalton
Planetary Model- Electrons move in fixed shells or orbitals around the nucleus
Bohr
Raisin Bun Model - negative particles rest in a positively charge ‘dough’
Thompson
Four basic elements were believed to be essential for life
Ancient Greeks
Quantum Mechanical model - Orbitals are regions of different shapes, based on the wave nature of electrons
Schrodinger
He proposed that paramanu (the atom) is an indestructible particle of matter
Indian sage - Acharya Kanad
Nuclear Model - the nucleus holds the positive charges and is very small, the negative electrons circle the outside
Rutherford
How to calculate for neutrons
Atomic Mass (Round to ones) - Atomic Number = Neutrons
Ionic Bonding:
electrons are lost from one atom and gained by another
Covalent Bonding:
electrons are shared
What is an inference?
a conclusion reached on the basis of evidence and reasoning.
