Atoms, Isotopes & Ions.

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Terms in this set (...)

Atom
The smallest building block of matter.
Neutron
A subatomic particle with no charge located in the nucleus of an atom.
Proton
A positively charged subatomic particle, located in the nucleus of an atom.
Nucleus
The center of an atom that is made up of protons and nutrons.
Electron
A negatively charged subatomic particle that orbits around the nucleus of an atom
Electron cloud
The area in which Electrons orbit around the nucleus of an atom.
Element
Pure substance made of a single type of atom.
Atomic number
A number that is unique to an element and can never be changed.
Atomic Symbol
A symbol on the periodic table representing an element.
Atomic mass
The weighted average of all known naturally occurring isotopes of a specific element.
Mass number
The atomic mass rounded
Neutrons
Subtracting the mass number from protons
Bohr diagram
A diagram of an atom, created by Neils Bohr
Isotope
different forms of an atom with the same number of protons but different numbers of neutrons, and mass number.
Isotopic Symbol
The atomic symbol of an element's isotope
Ions
An atom with a different number of electrons, making it an atom with a charge.
loses electrons
+
gains electrons
-
What is the difference between the atomic mass and the mass number?
The mass number is the sum of protons and neutrons, and the atomic mass is the mass of all isotopes of that element that have been averaged together.