Electrons and the Periodic Table Crossword

basic particle of an element
the average of all the isotopes of an element
particle that has no electrical charge
atomic particle that has a positive charge
atomic particle that has a negative charge
an atom that has the same number of protons, and a different number of neutrons from other atoms of the same element
elements in the same verticle column of the periodic table
an arrangement of the elements showing the repeating pattern of their properties
a horizontal row of elements in the periodic table
a one-or-two letter representation of an element
The central core of an atom which contains protons and neutrons
A region of an atom in which electrons of the same energy are likely to be found
The number of protons in the nucleus of an atom
The sum of the protons and neutrons in the nucleus of an atom.
grew as a series of models that developed from experimental evidence
proposed that matter was formed of small pieces that could not be cut into smaller parts
English chemist, inferred that atoms had certain characterisitcs
Discovered that atoms had negatively charged particles called electrons
suggested that the atoms is mostly empty space but has a positive charge at its center
sugggested that electrons are found only in specific orbits around the nucleus