Periodic Table Crossword Puzzle

the smallest unit of an element that maintains the properties of that element
a interaction that holds atoms or ions together
a representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products
a combination of chemical symbols and numbers to represent a substance
a one-, two-, or three-letter abbreviation of the name of an element
a subatomic particle that has a negative charge
a vertical column of elements in a periodic table that share chemical properties
the sum of the numbers protons and neutrons in the nucleus of an atom
an element that is shiny and that conducts heat and electricity well
an element that conducts heat and electricity poorly
a subatomic particle that has no charge and that is located in the nucleus of an atom
in physical science, an atom's central region, which is made up of protons and neutrons
in chemistry, a horizontal row of elements in the periodic table
an arrangement of the elements in order of their atomic numbers such that elements with similar properties fall in the same column, or group
a subatomic particle that has a positive charge and is located in the nucleus of an atom
a group of atoms that are held together by chemical bonds; it is also the smallest unit of a substance that can exist by itself