Chapter 5: Atomic Structure Flashcards

16301720726	Nucleus	The dense positively charged mass located in the center of an atom made of protons and neutrons.	0
16301720727	Proton	A subatomic particle that has a positive charge and that is found in the nucleus of an atom	1
16301720728	Electron	A subatomic particle that has a negative charge, is found outside the nucleus and has almost no mass	2
16301720729	Neutron	A subatomic particle that has no charge and that is found in the nucleus of an atom.	3
16301720730	Atomic number	A unique number for each element determined by the number of protons in an atom of that element.	4
16301720731	Mass number	The sum of the number of protons and neutrons in the nucleus of an atom.	5
16301720732	Isotopes	Atoms of a given element that have different numbers of neutrons and different mass numbers.	6
16301720733	Energy levels	The possible energies that electrons in an atom can have.	7
16301720734	Electron cloud	A visual model of the most likely locations for the electrons in an atom.	8
16301720735	Orbital	A region of space around the nucleus where an electron is likely to be found.	9
16301740977	Ion	An atom or group of atoms that has a positive or negative charge.	10
16301840043	Bohr Model	model of an atom that shows electrons in circular orbits around the nucleus	11