Abeka 9th grade Science Quiz 25
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10 Terms
Elements
Substances composed of a single type of atom are called ____________.
Proton
A subatomic particle that has a positive charge.
Chemical symbol
Each element is given an abbreviation called ___________.
Orbitals
According to the electron-cloud model, electrons move unpredictably through regions of space called ___________.
Mass number
The total number of protons and neutrons in an atom
Quarks
Scientist believe that protons and neutrons are composed of smaller particles called ____________.
Atoms
John Dalton proposed that all matter consists of tiny particles called ____________.
Isotopes
Atoms of the same element that have a different number of neutrons are ___________.
Heisenberg uncertainty principle
The principal stating that it is impossible to know both the position and velocity of an electron simultaneously
Quantum
The overall motion of each electron can be mathematically represented by four __________ numbers.
Note 
Flashcards (27)