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...
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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