Classification Of Matter Flashcards
Substance
Composition that does not vary from sample to sample
Elements
Substance that cannot be decomposed to simpler substances
Compound
Can be decomposed into simpler substances because it is made up of more than one element
Made of 2+ types of atoms
Relative composition
Law of Constant Composition /Definite proportions
States that compounds have a definite composition therefore the relative no. of atoms of each element in the compound is the same in any sample
Physical properties
Observed without changing a substance into another substance
Intensive properties
Independent on Amt og substance present like density
Extensive properties
Opp of intensive e.g mass
Physical changes
Changes in matter that don’t change composition of substance like temperature and changes of state
Chemical changes
Result in new substances like combustion
Peta
10^15
Teta
10^12
Giga
10^9
Mega
10^6
Kilo
10^3
Deci
10^-1
Centi
10^-2
Milli
10^-3
Micro
10^-6
Nano
10^-9
Pico
10^-12
Femto
10^-15
Atto
10^-18
Zepto
10^-21
Energy
Capacity to do work or transfer heat
Joules (J)
Work
Energy transferred when a force is exerted on an object causing displacement of that object
Heat
Energy used to cause temp of object to rise
Force
Push or pull force
Exact number
Counted numbers like 12 eggs is a dozen
Inexact numbers /measured
Numbers dependant on how they were measured
Significant numbers
Digits of a measured quantity including uncertain ones
