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Ch 7 Inside the Atom

8th grade Ch. 1 Exploring and Classifying
Horizontales
Number of protons in the nucleus of an atom of any given element.
Electrode with a positive charge.
The sum of neutrons and protons in the nucleus of an atom.
Release of nuclear particles and energy form unstable atomic nuclei.
Region surrounding the nucleus of an atom, where electrons are most likely to be found.
Negatively-charged particle that exists in an electron cloud formation around an atom's nucleus.
Electrically-neutral particle that has the same mass as a proton and is found in an atom's nucleus.
Substance that cannot be broken down into simpler substances.
Verticales
The change of one element into another through radioactive decay.
A high-energy electron that comes from the nucleus.
Consists of a particle containing two protons and two neutrons
Atoms of the same element that have different numbers of neutrons.
Time needed for one half of the mass of a sample of a radioactive isotope to decay.
Positively-charged particle in the nucleus of an atom.
Electrode with a negative charge.