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7th CK SCI Atomic Structure COMPLETE

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.

amu   Atomic Mass Unit, the unit used to weigh subatomic particles  
Atom   the smallest piece of matter  
Atomic mass   the average of all the mass numbers of all the isotopes of an element that occurs in nature  
Atomic number   the number of protons in the nucleus of an atom  
Corpuscle   negative subatomic particle in the atom discovered by J.J. Thomson; today it is known as an electron  
Electron cloud   the area surrounding the nucleus where electrons are found  
Element   the simplest pure substance  
Indirect evidence   evidence that is gained based on observation  
Isotope   an atom of a given element with a different number of neutrons than protons  
Mass number   the sum of the number of protons and neutrons contained in an atom’s nucleus  
Matter   anything with mass and volume  
Molecule   two or more atoms chemically bonded together  
Neutron   subatomic particle with no charge located in the nucleus of the atom  
Nucleus   the center of positive charge in the nucleus; discovered by Ernest Rutherford  
Proton   subatomic particle with a positive charge located in the nucleus of the atom  
Pure substance   a substance in which all particles are alike  
Subatomic particle   particle smaller that the atom  


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Created by: artisteacher