The Periodic Table of Elements Crossword

there is a unique number of these for each element and their charge is positive
these have a neutral charge and add or take away weight from an atom without changing the element
these have a negative charge and weigh almost nothing
atoms with more or less neutrons to change the mass
pure substance that can’t be broken down to any other substance
smallest particle of an element
where protons and neutrons are located
where electrons are located
a model that shows how many protons, neutrons, and electrons there are
this is the unit of measurement you use when describing an atoms mass
this number tells you how many protons there are
if the elements are written in black this is the form of how they were found
if the elements are written in red this is the form of how they were found
if the elements are written in green this is the form of how they were found
these electrons are found in the outermost layer of the atom
these types of isotopes decay over time and emit radiation
this model shows the valence electrons
the charge of an atom with less electrons than protons
the charge of an atom with more electrons than protons
the charge of an atom with the same number of electrons and protons