deck_14981782 Flashcards
the quality of something is being assessed, not its size or quantity
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
Purpose/Question
What does WHMIS stand for?
Workplace Hazardous Materials Information System
What does HHPS stand for?
Hazardous Household product symbols
Define Physical Property
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance.
Define Chemical Property
The definition of a chemical property is a specific characteristic of a substance like an element or a compound, relating to how it can change as a result of a reaction.
Define Physical Change
Physical change is a type of change where the physical properties of matter change.
Define Chemical Change
A chemical change is a change of materials into another, new materials with different properties and one or more than one new substances are formed.
What are the 5 evidences of chemical change?
1.Change in color2. Bubbling3. light/heat4. Precipitation5. 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 itTransparent - clear/see throughTranslucent - foggyOpaque - 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
