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Atomic Structure Review

Horizontales
the tiny, dense central portion of an atom, composed of protons and neutrons
Physicist who showed that atoms of any element can be made to emit tiny negative particles, which are now called electrons.
a unit of mass equal to one-twelfth the mass of a carbon-12 atom
a positively charged subatomic particle found in the nucleus of an atom
the weighted average of the masses of the isotopes of an element
atoms of the same element that have the same atomic number but different atomic masses due to a different number of neutrons
Philosopher who thought that all forms of matter were divisible into tiny indivisible particles, he called them atoms.
Physicist who concluded that each gold atom contained a positively charged mass that occupied a tiny volume, he called the mass the nucleus.
Verticales
English schoolmaster who proposed his model of the atom–which was based on experimentation in 1803.
a negatively charged subatomic particle
a stream of electrons produced at the negative electrode (cathode) of a tube containing a gas at low pressure
the total number of protons and neutrons in the nucleus of an atom
a subatomic particle with no charge and a mass of 1 amu; found in the nucleus of an atom
the number of protons in the nucleus of an atom of an element
the smallest particle of an element that retains its identity in a chemical reaction