Bohr model - Guías de estudio, Notas de estudios & Resúmenes

AQA AS Physical Chemistry 2024 exam questions with 100% correct answers Who described atoms as solid spheres that make up different elements and when? - ANSWERS John Dalton in the 19th century Who suggested that atoms of a particular element had the same mass and atoms of different elements had different masses and when? - ANSWERS John Dalton in 1803 Who discovered the electron and when? - ANSWERS JJ Thomson, 1897 discovered electrons proving atoms weren't indivisible or solid. New m...

1. Record: Click Fire. The lamp emits photons of 1 eV, 2 eV, and so on up to 20 eV. The EL Photon Detector Display shows the photons that pass directly through the gas. Any missing photons were absorbed by the gas before being reemitted at various angles. Which photon energies were absorbed by Gas A? 2. Observe: Select the Laser on the left and the ORBITALS tab on the right. Set the Energy (eV) to 4 eV. The atom model at right, called the Bohr model, shows the nucleus of the atom as a purp...

AQA AS Physical Chemistry Exam Questions and Answers Who described atoms as solid spheres that make up different elements and when? - Answer- John Dalton in the 19th century Who suggested that atoms of a particular element had the same mass and atoms of different elements had different masses and when? - Answer- John Dalton in 1803 Who discovered the electron and when? - Answer- JJ Thomson, 1897 discovered electrons proving atoms weren't indivisible or solid. New model named plum puddin...

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...

AQA AS Physical Chemistry 2024 exam questions with 100% correct answers Who described atoms as solid spheres that make up different elements and when? - ANSWERS John Dalton in the 19th century Who suggested that atoms of a particular element had the same mass and atoms of different elements had different masses and when? - ANSWERS John Dalton in 1803 Who discovered the electron and when? - ANSWERS JJ Thomson, 1897 discovered electrons proving atoms weren't indivisible or solid. New m...

AQA AS Physical Chemistry 2024 Exam Questions And Answers Who described atoms as solid spheres that make up different elements and when? - ANSWER- John Dalton in the 19th century Who suggested that atoms of a particular element had the same mass and atoms of different elements had different masses and when? - ANSWER- John Dalton in 1803 Who discovered the electron and when? - ANSWER- JJ Thomson, 1897 discovered electrons proving atoms weren't indivisible or solid. New model named pl...

Acceleration - Any change in speed or direction Activation energy - the amount of energy needed to start a reaction All objects experience the same acceleration due to - gravity, but only in the absence of air friction Alloys - mixture of metals Alpha decay - a nucleus gives up a helium nucleus Amplitude - The height of the wave, how far you are from the equilibrium Angular Momentum conserved - Angular momentum = Mass * Velocity * Radius Ice Skater ex. As she pulls her arms in, velocity i...

AQA 2023 AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry questions and answers verified What is the equation linking mass moles and MR? Mass=moles * MR What is the definition of Ar (relative atomic mass)? The average mass of an atom of an element compared to the mass of one twelfth of carbon 12. What does Mr stand for? Relative molecular mass Define relative isotopic mass. The mass of an isotope of an element compared to the mass of one twelfth of the mass of carbon 12 ...

2 © OCR 2023 Section A You should spend a maximum of 20 minutes on this section. Write your answer to each question in the box provided. 1 Which new feature of the atomic model did Niels Bohr suggest? A Electrons are in stable shells. B Electrons orbit a nucleus. C The atom has a nucleus. D The nucleus is positive. Your answer [1] 2 Two rooms have the same fixed volume. They contain identical gases at the same pressure. Room H is at a higher temperature than room L. Which statement...

Joseph (JJ) Thomson - Developed "plum pudding model" Interactions in x-ray tube - Happen at atomic level Ernest Rutherford - Model resembling tiny solar system Niels Bohr - Atoms have 3 particles Protons, Neutrons, and electrons binding energy - Energy needed to split up and atom Electron binding energy depends on - How close the electron is to the nucleus and how many protons are in the atom