Definitions:History Of The Atom Flashcards
1
Q
Element
A
A substance that cannot be chemically broken down further
2
Q
Compound
A
A substance that is made up of two or more elements combined together chemically
3
Q
Law of conservation of mass
A
Mather is neither created or destroyed in the course of a chemical reaction
4
Q
Plum pudding model
A
Thomson’s atom consisted of a positive sphere with negative particles embedded within it
5
Q
Heisenberg uncertainty principle
A
It is not possible to determine at the same time the exact position and velocity of an electron
