Atomic Structure Vocab Test

Dalton’s Atomic Theory ~Matter is composed of extremely small particles called atoms. ~Atoms are indivisible and indestructible. ~Atoms of a given element are identical in size, mass, and chemical properties. ~Atoms of a specific element are different from those of another element. ~Different atoms combine in simple whole-number ratios to form compounds. ~In a chemical […]

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Atomic Physics – review

Atomic Emission Spectra All object emit thermal radiation characterized by a continuous distribution of wavelengths A discrete line of spectrum is observed when a low pressure gas is subjected to an electrical discharge Emission spectroscopy observation of spectral lines atomic hydrogen simplest line spectrum Unique spectra a technique for identifying the elements present in unknown […]

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Chapter 4: Atomic Structure

Democritus Democritus was an Ancient Greek pre-Socratic philosopher primarily remembered today for his formulation of an atomic theory of the universe. Democritus was born in Abdera, Thrace, around 460 BC, although some thought it was 490 BC John Dalton John Dalton FRS was an English chemist, physicist, and meteorologist. He is best known for proposing […]

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Chapter 9 and 10 Atoms and Nuclear Physics

alpha decay The disintegration of a nucleus into a nucleus of another element with the emission of an alpha particle, which is a helium nucleus. atomic mass The weighed average mass of an atom of the element in naturally occurring samples; given under its symbol in the period table (in atomic mass units, symbolized u). […]

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Atomic Structure and nuclear energy

Subtomic Anything smaller than an atom. ( the particles that make up an atom). Nucleus center of atom, contains protons and neutrons. Protons nucleon with a positive charge. mass of one AMU Neutrons nucleon with no charge. mass of one AMU Electron Subatomic particle with a negative charge Electron cloud area around the nucleus where […]

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Chapter 4 Atomic physics & Spectra

Absorption Line An isolated bright or dark line in a spectrum produced by emission or absorption of light of a single wavelength. Absorption Line Spectrum The electromagnetic spectrum, broken by a specific pattern of dark lines or bands, observed when radiation traverses a particular absorbing medium. The absorption pattern is unique and can be used […]

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AQA Trilogy Physics Atomic Structure

Atom Contains a positively charged nucleus made of protons and neutrons, surrounded by negatively charged electrons Size of atom Very small with a radius of 0.000000001m Charge of proton +1 Relative mass of proton 1 Charge of electron -1 Relative mass of electron 1/5000 (negligible) Charge of neutron Relative mass of neutron 1 Charge of […]

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Atomic Physics – Chapter 9

classical physics development of physics before 1900 modern physics development of physics after 1900 atomic physics to do with the electrons in an atom discrete matter elements would get to a point where they couldn’t be divided anymore (true) idea of continuous matter you can keep dividing elements forever and ever – Aristotle John Dalton […]

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(Chapter 10 – Nuclear Physics) Introduction to Physical Science 13th ed.

strong nuclear force Fundamental force that holds the nucleus together fusion Process in which smaller nuclei combine to f0rm larger ones neutrons Neutral particles in atoms radioactivity Spontaneous process of nuclei changing by emitting particles or rays electrons Negatively charged particles in atoms beta decay Radioactive decay in which electrons are emitted radioactive isotope Specific […]

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