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Atoms and Elements crossword

Horizontales
A particle in the nucleus with a positive charge
A particle in the nucleus with a neutral or no, charge.
The scientist who theorized that electrons orbit the nucleus of the atom in orbits like planets
A horizontal row in the periodic table
The number of protons in an element
The 3 major classifications of elements on the periodic table
An abbreviated, one or two letter symbol used to write an element's name beginning with a capital letter.
The negatively charged particle in the electron cloud
The Greek scientists who named the atom, "atomas" meaning indivisable
Regions inside the atom where electrons are likely to be found. This model is developed by Schrodinger, is called Quantum Theory
Verticales
The arrangement of elements on a table based on their atomic number
The scientist who started the modern atomic theory & confirmed Democritus' model of the indivisible atom
Particles, like protons, neutrons and electrons that are smaller than the atom
The scientist who discovered negatively charged particles , using Cathode Ray tube experiment
A column in the periodic table, also called a family containing elements with the same number of valence electrons
The scientist who worked with thomson and added the nucleus to the modern model of the atom, using gold foil experiment
The average of the masses of the naturally occurring isotopes in an element
One of a hundred or so pure substances that cannot be broken down into simpler substances
The tiny, dense positively charged region in the center of an atom