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Chemistry Atom Already Rated A+

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Chemistry Atom Already Rated A+ Atomic Structure The smallest particle of an element that retains its elemental properties is the atom. The number of protons in an atom is equal to the number of electrons. Electrons are tiny, fast-moving particles with a negative charge that orbit the nucle...

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  • July 10, 2024
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  • 2023/2024
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Chemistry Atom Already Rated A+
Atomic Structure




The smallest particle of an element that retains its elemental properties is the atom. The number of


protons in an atom is equal to the number of electrons. Electrons are tiny, fast-moving particles with a


negative charge that orbit the nucleus.




Subatomic Particles




Protons are positively charged particles that reside in the nucleus, carrying a charge opposite to that of


electrons. Neutrons, on the other hand, have a nearly identical mass to protons but lack an electric


charge. They also reside in the nucleus alongside protons.




Atomic Models

, Dalton's atomic theory proposes that matter is composed of minute particles called atoms. The plum


pudding model, developed later, envisioned an atom as a spherical shape with a uniform positive charge


and electrons scattered throughout. However, Rutherford's nuclear atomic model revolutionized our


understanding of atomic structure, revealing that atoms are mostly empty space with almost all positive


charge and mass concentrated in the nucleus. Electrons orbit this nucleus due to their attraction to the


positive charge.




Location of Subatomic Particles




Protons and neutrons reside in the nucleus of an atom, while electrons orbit around it. James Chadwick


discovered neutrons, which were previously unknown.




Who proposed that the atom has only certain allowable energy states ✔️Niels Bohr




Isotopes ✔️Atoms with the same number of protons but different number of neutrons

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