chemistry topic 1-3 Flashcards
What does WHMIS stand for?
Workplace Hazardous Materials Information System
What are the five points of the Particle Model of Matter?
Everything is made up of particles
Particles are always moving
Particles of one substance are unique
Particles are attracted to one another
As temperature increases, particles speed up
What is the difference between a Mixture and a Pure Substance?
Mixture – mixture of two or more parts
Pure Substance – consistent throughout – one type of particle
What is the difference between a Mechanical Mixture and a Suspension
Suspensions have a clear separation of particles, where one particle type will become suspended in a layer upon the other. Mechanical mixtures have one type of particles randomly mixed within the others.
What is the difference between a Physical Change and a Chemical Reaction?
A physical change does not produce a new substance, a chemical change does produce a new substance.
List 5 clues that indicate that a chemical reaction has taken place.
-Bubbles
- Temperature change
- New odor
- Unexpected colour change
- Formation of a precipitate
What is the difference between a Qualitative observation and a Quantitative observation?
Qualitative – has no number value attached to it. Ex. Colour, Texture, Lustre, etc
Quantitative – has a number value attached to it. Ex. Mass, Boiling Point, Melting Point
What is the difference between a ELEMENT and a COMPOUND? List two things about each
Elements make up compounds. Both are pure substances.
Elements – Hydrogen, Helium, Lithium, etc
Compounds – Water, Salt, Baking soda
The Law of Definite Proportions helps to define what a compound is. What is the Law of Definite Proportions?
The Law of Definite Composition (Proportions) states that compounds will always occur in the same ratios. As an example, water will always have 2 hydrogen atoms and 1 oxygen atom.
What are the 4 main points of Dalton’s Atomic Theory?
Everything is made of atoms
Atoms can not be created, destroyed, or divided
All atoms of the same type are identical
2 or more different atoms can form a compound
What is ELECTROLYSIS? What is it used for?
Electrolysis is the use of electricity to break down compounds into their elements.
“billiard ball” model, whose is that
dalton
“plum pudding model” who dat
thompson
_____ proposes fixed circular orbits around the nucleus for electrons
bohr
PARITCLE MODEL OF MATTER GO
tiny particles, own kind, attracts each other, always moving , higher = faster
