The Atom Flashcards
What is the relative atomic mass?
The average mass of all the naturally occurring isotopes of an element.
What’s in the structure of an atom?
Electron, nucleus, proton
What does the atomic number show?
The number of protons in an atom.
What is the atomic mass number?
The number of protons and neutrons in the nucleus of an atom.
What is an isotope?
They’re in an element and have the same number of protons, but a different number of neutrons.
What is an atomic orbital?
The region in which an electron may be found around a single atom.
What is electron configuration?
The arrangement of electrons in an atom, molecule or other physical structure.
What are valence electrons?
The electrons in the outermost energy level of an atom.
What are core electrons?
All the electrons in an atom, excluding the valence electrons.
