Quantized light - Study guides, Class notes & Summaries

What is a photomultiplier? - A vacuum tube consisting of a photoemissive cathode, a series of intermediate electrodes called dynodes, and a collection anode. What does a single-beam spectrophotometer do? - A single-beam spectrophotometer employs one beam of radiation that irradiates one cell. What happens in a deuterium lamp? - The lamp energy from the power source produces an excited deuterium molecule that dissociates into two atoms in the ground state and a photon and the energies of th...

DAT General Chemistry Latest Update Graded A+ Atomic Number number of protons found in that atom; low number; (Z) Mass Number Protons + Neutrons; high number; (A) Atomic Mass relative mass of that atom compared to the mass of a carbon-12 atom (which is set at 12.00); measured in amu; 1 amu = 1.66x10^-24 Atomic Weight weight (g) of one mole (mol) of a given element (g/mol); the weighted average of all the masses (not the weights) of an element, weighted according to the natural abundance of t...

General Chemistry ACS EXAM Review 168 Questions with Verified Answers Rutherford's Gold Foil Experiment - CORRECT ANSWER proposed that atoms consist of a tiny, massive, positive nucleus surrounded by electrons nucleus - CORRECT ANSWER contains all the positive charge and nearly all the mass of the atom James Chadwick - CORRECT ANSWER discovered the neutron cathode rays - CORRECT ANSWER move from negative electrode to positive electrode (like electrons in a voltaic cell) Thompson...

What does a photometer do? - ANSWER It converts light into electric current. What are photons? - ANSWER Tiny quantized packets of light. What happens in the photoelectric effect? - ANSWER Light hits a metal and electrons are emitted. What should the digital multimeter be set to read? - ANSWER voltage How does the flux of light from an isotropic source depend on the distance r from the source? - ANSWER r−2 How does the flux of light from an collimated source depend on the distanc...

CLEP Chemistry Exam Questions & Answers 2024. John Dalton - correct answer Proposed that matter is composed of atoms; these atoms have different identities called elements, which combine to form compounds; measured masses of reactants and products. J.J. Thompson - correct answer Observed deflection of particles in a cathode ray tube; proposed that atoms are composed of positive and negative charges; developed the plum pudding model of the atom Robert Millikan - correct answer Calculated t...

Chapter 1 - Chemical Foundations 1. Consider the element indium, atomic number 49, atomic mass 114.8 g. The nucleus of an atom of indium-112 contains: a. 49 protons, 63 neutrons, 49 electrons. b. 49 protons, 49 neutrons. c. 49 protons, 49 alpha particles. d. 49 protons, 63 neutrons. e. 49 protons, 112 neutrons. ANSWER: d POINTS: 1 2. A hypothetical element consists of two isotopes of masses 78.95 amu and 80.95 amu with abundances of 32.9% and 67.1%, respectively. What is the average a...

DAT General Chemistry Exam Questions Correctly Answered. Atomic Number - CORRECT ANSWER number of protons found in that atom; low number; (Z) Mass Number - CORRECT ANSWER Protons + Neutrons; high number; (A) Atomic Mass - CORRECT ANSWER relative mass of that atom compared to the mass of a carbon-12 atom (which is set at 12.00); measured in amu; 1 amu = - CORRECT ANSWER 1.66x10^-24 Atomic Weight - CORRECT ANSWER weight (g) of one mole (mol) of a given element (g/mol); the weighte...

kinetic theory states that matter is composed of a large number of particles that are in constant motion. what is the formula for the ideal gas law? pv=nrt Brainpower Read More 0:07 / 0:15 what is the formula for Charles' law? v1 over t1 = v2 over t2 chemical thermodynamics the study of the relationship between chemical reactions and the laws of thermodynamics. kinetic energy energy of motion system the portion of the universe being studied ...

Quantum Mechanics History Planck ️Energy is discontinuous, quantum Einstein ️Light is both a wave and particle(Photoelectric effect) Bohr ️Bohr Model of Atom, electrons move in fixed orbits around nucleus, energy levels are quantized DeBroglie ️Matter is both a particle and a wave Heisenberg ️Uncertainty Principle:Can't know both location and velocity of a particle. Schrodinger ️Wave functions, orbitals, and quantum mechanical model

ACS GEN CHEM 1 FINAL Exam 166 Questions with Verified Answers The physical material of the universe. It is anything that has mass and occupies space. - CORRECT ANSWER Matter is made up of relatively few elements. - CORRECT ANSWER Matter The smallest building block of matter. Smallest particle that retains the chemical property of the element (O, He, S). - CORRECT ANSWER Atom Each _______ is made of the same kind of atom - CORRECT ANSWER Element Combination of atoms held together i...