Physics Flashcards

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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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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History of Nuclear Physics and Glossary

Anti-Ballistic Missile or National Missile Defense (ABM or NMD) A system with the ability to destroy enemy missiles or their warheads before they hit their targets. This is usually presented as a “defensive” capability, but it is worth noting that this is a counterforce capability Atom A particle of matter indivisible by chemical means. It […]

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Ch 30 Atomic Physics

atom basic unit of matter, which consists of a central, positively charged nucleus surrounded by negatively charged electrons Brownian motion the continuous random movement of particles of matter suspended in a liquid or gas cathode-ray tube a vacuum tube containing a source of electrons and a screen to view images planetary model of the atom […]

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Ch 9 Atomic Physics

a. Democritus The ancient Greek who is known for championing the concept of atom was named ______________. a. Democritus b. Socrates c. Plato d. Zeus d. Thomson Who discovered the electron in 1897? a. Dalton b. Bohr c. Rutherford d. Thomson d. Dalton The “billiard ball model” of the atom is associated with _______. a. […]

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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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Physics (Atomic structure) GCSE 9-1 AQA COPY

Atoms Atoms contain a positively charged nucleus made up of protons and neutrons.Which is surrounded by negatively charges electrons. How may the energy level of an electron change? – Absorbing electromagnetic radiation moves electrons to a higher energy level, further from the nucleus. – Electromagnetic radiation is emitted when an electron drops to a lower […]

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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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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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Unit 11: Nuclear Physics

a strong nuclear force Protons and neutrons are held together by what? Atomic number -z- # of protons; defines each element -n- # of neutrons; can vary for each element Mass number -A- Total number of protons -z- and neutrons -n- Isotope the term used to describe different atoms of the same element SAME; DIFFERENT […]

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Nuclear Physics and Radioactivity Vocabulary

proton the nucleus of the simplest atom- hydrogen. It has a positive charge of +q and a mass of m=1.67×10^-27 kg neutron a particle found in the nucleus that is electrically neutral and that has a mass almost identical to the proton. It was discovered in 1932 by James Chadwick, Its charge is q=0, its […]

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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 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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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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Atomic Physics Review

energy of a photon depends on frequency planks constant the ratio of energy to frequency for a given photon produces photon small packet of electromagnetic energy that has particle-like properties the kinetic energy of a photoelectron depends on wavelength of light in order for a photon to eject an electron from a metal’s surface in […]

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Physics atomic structure of matter

Fnet*t=mv-mv0 law of impulse and momentum Vector Impulse V or S Vector Momentum V or S Kgm/s or N*s SI units for Impulse and Momentum Momentum Sum of individual momenta Conserved Total momentum is m1v1+m2v2=m1v1’+m2v2′ Law of elastic collision m1v1+m2v2=v'(m1+m2) Law of inelastic collision m1v1’=m2v2′ Law when both objects have an initial velocity of 0 […]

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Chapter 30 : Nuclear Physics

Atomic number Z, of an atom is the number of protons. (Nuclear charge= Ze Atomic Mass Unit 1.66 X 10^-27 Kg (u) Mass number (A) number of neutrons and protons. Nuclear mass= A (u) Nuclide nucleus of an isotope. Strong nuclear force also called strong force, acts between protons and neutrons that are close together, […]

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Year 12 Atomic Physics

Absorber Material that prevent radioactive emission from passing through it. ???? Activity Number of radioactive emissions/counts per second- also known as “rate of decay”. ???? Alpha emission Release of alpha particle from, unstable nucleus (A 2+ helium ion or a helium nucleus. ???? Alpha particle The nucleus of a helium atom (two protons and 2 […]

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The Atom and Nuclear Physics

Who believed the atom was a solid sphere? Democritus What 3 things did Democritus propose about the atom? – Matter can not be divided , cannot be cut(atomos) – Small hard particles, that are made of the same material but are different shapes and sizes – They are always moving and have spaces What did […]

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Chapter 21 Atomic Physics

What is blackbody radiation? electromagnetic waves reflected off a blackbody What is a blackbody? object that has absorbed almost all electromagnetic waves What is an example of a blackbody? black hole What is ultraviolet catastrophe? failed prediction of classical physics that the energy radiated by a blackbody at extremely short wavelengths is extremely large and […]

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KS4 Chemistry – Atomic structure

atom Atoms are small particles from which all substances are made. They are the smallest neutral part of an element that can take part in chemical reactions. electron Tiny particle with a negative charge that is found in shells around the nucleus of an atom. electron shell Area around a nucleus that can be occupied […]

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