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Structure of The Atom

Across
A small, positively charged center of the atom that is surrounded by a cloud containing electron.
The smallest possible object of matter.
Different forms of one element.
The outermost layer of an atom.
An electron of an atom, located in the outermost shell of the atom, that can be transferred to or shared with another atom.
Positively charged particle that is found in the nucleus.
A proton, neutron, or any elementary particle that decays into a set of particles that includes a proton.
Any particle that obeys Bose-Einstein statistics: bosons have integral spins: 0, 1, 2, ….
Down
The area where electrons float and move around the nucleus.
Each of the actual or potential patterns of electron density that may be formed in an atom or molecule by one or more electrons, and that can be represented as a wave function.
Any hadron, or strongly interacting particle, other than a baryon. Mesons are bosons, having spins of 0, 1, 2, …, and, unlike baryons, do not obey a conservation law.
Any elementary particle that is subject to the strong interaction. Hadrons are subdivided into baryons and mesons.
A particle with no charge found inside the nucleus.
A negatively charged particle found outside of the nucleus.
Any of the hypothetical particles with spin 1/2, baryon number 1/3, and electric charge 1/3 or −2/3 that, together with their antiparticles, are believed to constitute all the elementary particles classed as baryons and mesons.