Elements and Atoms Crossword

smallest unit of life
a positively charged subatomic particle
particle in the atom with no charge
substance that cannot be broken down by regular chemical means
electrons with similar energies are said to be at the same __________________________
usually the first or second letter(s) of the English or Latin name for an element
adding the number of protons and neutrons gives you this number
the outermost concentric ring in an a Bohr's model
composed of clusters of protons and neutrons
fixed number of protons in the atomic nucleus tells us this
the chart of elements arranged by atomic number
atom of an element with the same number of protons and electrons but varies by neutron
an unstable isotope that tends to decay and emit radiation
three dimensional space regions through which electrons move
electrons need this to move between orbitals
radioactive decay can be detected by this method
the backbone of organic molecules
extremely small masses are expressed in terms of ____________________
diagrams of an electron and its configuration in an atom (Hint: this diagram displays them arranged in circles)