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Studying Atoms

Name:
Across
Has the same atomic number but different mass because they have different numbers of neutrons
A positively charged subatomic particle that is found in the nucleus of an atom
All matter is made up of individual particles called atoms which cannot be divided
The first evidence that atoms are made of even smaller particles
The arrangement of electrons in the orbitals of an atom
The sum of the protons and neutrons in the nucleus of that atom
When all the electrons in an atom have the lowest possible energies
Equals the number of protons in an atom of of that element
A region of space around the nucleus where an electron is likely to be found
Down
A negatively charged subatomic particle that is found in the space outside the nucleus
The arrangement of electrons in the orbitals of an atom
A neutral subatomic particle that is found in the nucleus of an atom. It has a mass almost exactly equal to that of a proton
All of an atoms positive charge is concentrated in it's nucleus
Possible energies that electrons in an atom can have
Describes the possible locations of electrons around the nucleus
The plural of nucleus
A dense positively charged mass located in the center of the atom