Quantum model of the atom - Study guides, Class notes & Summaries

General Chemistry: Exam 1 Practice Test Questions and Answers | Latest Version | 2024/2025 | Already Passed What is the principle behind Rutherford's gold foil experiment? - It demonstrated that atoms consist of a large, positively charged nucleus surrounded by electrons. - It showed that atoms have a dense, positively charged nucleus with electrons orbiting around it. - It proved that electrons are evenly distributed throughout the atom. - It confirmed that atoms are indivisibl...

Rutherford's Gold Foil Experiment - proposed that atoms consist of a tiny, massive, positive nucleus surrounded by electrons nucleus - contains all the positive charge and nearly all the mass of the atom James Chadwick - discovered the neutron cathode rays - move from negative electrode to positive electrode (like electrons in a voltaic cell) Thompson's Cathode Ray Experiment - discovery of the electron (also the discovery that atoms are divisible into smaller particles) Milliki...

The speed of a wave (c) is the product of its frequency (ν) and wavelength (λ). Correct Answer: E = hv = h x c / λ nm to m or m to nm Correct Answer: 1 m / 10^9 nm or 10^9 nm / 1 m What is the maximum number of electrons that can have the quantum numbers n = 3, ℓ = 2, mℓ = -2? Correct Answer: The Pauli exclusion principle states that no two electrons in a given atom can share the same set of four quantum numbers (n, ℓ, mℓ, ms). This set of quantum numbers contains three...

Protons positively charged particles Neutrons neutrally charged particles Electrons negatively charged particles Cations positively charged ions Anions negatively charged ions Mass Number sum of number of protons and neutrons in nucleus of an atom Isotope two or more forms of the same element (same number of protons) whose atoms differ in number of neutrons, and in mass, with the same atomic number and different mass number. Quantitative information such as numerical data Qualita...

ACS Chemistry Final Exam 182 Questions with Verified Answers Layout of an element (mass # & atomic #) - CORRECT ANSWER atomic number = - CORRECT ANSWER # of protons mass number = - CORRECT ANSWER # of protons + neutrons the number of protons in a neutral atom will equal the - CORRECT ANSWER # of electrons how to find the correct number of neutrons - CORRECT ANSWER mass number - atomic number Forms of the same elements that differ in amount of neutrons - CORRECT ANSWER isotopes...

Quantum Mechanics Already Graded A+ Max Planck : German physicist who solved the problem of why different wave lengths are emitted at different temperatures- proposed that the energy absorbed or emitted by an object could only occur in "pieces"- which he called quantum Wener Heisenberg : German theoretical physicist- published his theory on quantum mechanics when he was 23- concluded that it is impossible to make a measurement on an object without disturbing the object Albert...

Chem 219: Exam Questions With 100% Correct Answers The speed of a wave (c) is the product of its frequency (ν) and wavelength (λ). E = hv = h x c / λ nm to m or m to nm 1 m / 10^9 nm or 10^9 nm / 1 m What is the maximum number of electrons that can have the quantum numbers n = 3, ℓ = 2, mℓ = -2? The Pauli exclusion principle states that no two electrons in a given atom can share the same set of four quantum numbers (n, ℓ, mℓ, ms). This set of quantum numbers contains thr...

General Chemistry 1 Exam 1 | Latest Update | 2024/2025 | Rated A+ What is the role of the Pauli exclusion principle in determining the electron configuration of atoms? The Pauli exclusion principle states that no two electrons in an atom can have the same set of quantum numbers, which helps determine the unique electron configuration and arrangement in orbitals. How do isotopes of the same element differ from each other? Isotopes of the same element have the same number of proton...

Introduction to Quantum Mechanics Graded A+ Back to Bohr: Bohr gave us Quantization Quantization means electrons can only exist in certain discrete energy levels (like a staircase, they can only completely be on the first or second stair but never in between stairs different distances from ground) If you recall rings= orbits e- must be in a _______ and e- are different distances(or E) from ________ orbit; nucleus Bohr was Bad: Bohr model of the atom could predict the ____________ _...

Describe the relationship between the frequency, wavelength, and velocity (speed) of a wave. - AnswerThe more times the wave is passing through a point in space = a higher frequency, the higher frequency creates a smaller wavelength, which is why the smallest wave is a gamma wave, it has the highest frequency and the shortest distance between waves, the velocity can be measured in m/s and is composed of frequency and wavelength Calculate any one (frequency, wavelength, or velocity) given the...