Chemistry Flashcards
(17 cards)
Chemistry Definition
The physical science that deals with composition, properties and changes in matter
Define WHMIS
Workplace Hazardous Materials Information System
Triangle shaped sign
Caution
four sided sign
warning
stop sign shape
danger
physical changes
no new substance is formed
examples of physical change
melting, freezing, grinding of lead
chemical changes
at least one new substance is formed
examples of chemical change
cooking, burning/combustion
Types of matter
pure substances, and mixtures
types of pure substance
elements and compounds
types of mixtures
homogeneous and heterogeneous
What defines an element
-one type of atom
-cannot be broken down by heat or electrify
-one capital letter
What defines a compound
-two or more atoms
-can be broken down by heat or electricity
-must more then one capital
define physical properties
physical properties describe the physical appearance and composition of a substance
define chemical properties
chemical properties describe the reactivity of a substance. For example calcium reacts vigorously when placed in water. This is one f calcium’s chemical properties.
examples of physical properties
solubility, state, colour, boiling point, condensation point, melting point, freezing point, malleability, ductility, conductivity, magnetism
