Chemistry Atom Already Rated A+

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 Mass number ️Some of the atomic number or protons and neutrons Mass number on top ️Atomic number on bottom How do you determine the number of protons in an atom ️The atomic number is the same as the proton number What is the charge of a proton ️+1 How do you determine the number of neutrons in and atom ️Mass number minus