Bohr model Guías de estudio, Notas de estudios & Resúmenes

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 ...

CLEP Chemistry Review Practice Questions 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 ...

AQA Chemistry A Level Exam What is the relative mass and charge on a proton? - correct answer Mass 1 charge +1 What is the relative mass and charge on a neutron? - correct answer Mass 1 Charge 0 What is the relative mass and charge on an electron? - correct answer Mass 1/2000 Charge -1 What is the mass number? - correct answer The total number of protons and neutrons in the nucleus of an atom What is the Atomic (proton) number? - correct answer This is the number of protons in the...

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

Binding energy -ANSWER min amount of energy required to "free" and electron from an atom. Unstable vs stable -ANSWER stable-non radioactive unstable- radioactive Ionization -ANSWER removal of an ELECTRON from an atom Excitation -ANSWER electron absorbs enough energy to make it move to an UNOCCUPIED shell Strong nuclear force -ANSWER energy used to hold particles inside the nucleus Electromagnetic nuclear force -ANSWER energy used to have atoms interact with other molecules W...

Plasma - ANSWER ionized gas that has some electrons that are described as free because they are not bound to an atom or molecule specific gravity - ANSWER measurement of the density of substances in a liquid compared to water atomic theory - ANSWER a theory that states that all matter is composed of tiny particles called atoms. John Dalton - ANSWER developed modern atomic theory negative ion - ANSWER anion, gains electrons positive ion - ANSWER cation; loses electrons ionic bon...

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...

GCSE EDEXCEL TRIPLE SCIENCE CHEMISTRY PAPER 2 2024/2025 QUESTION PAPER ALREADY PASSED What does 'aq' mean? - answer Aqueous - it is dissolved in water Water - formula - answer H20 Ammonia - formula - answer NH3 Carbon Dioxide - formula - answer CO2 Hydrogen - formula - answer H2 Chlorine - formula - answer Cl2 Oxygen - formula - answer O2 Ammonium (ion) - formula - answer NH4 (+) Hydroxide (ion) - formula - answer OH (-) Nitrate (ion) - formula - answer NO3 (-) Carbonate (ion) -...

Schrodinger (1925) Continued upon Bohr's findings to determine where electrons are typically found. Heisenberg (1927) Created the heisenberg uncertainty principle because you never can predict where the electron is. (Breaking Bad) De Broglie (1924) Electrons act like waves around the atom. Niels Bohr (Bohrbit) (1913) Electrons can orbit the nucleus in certain special orbits at different energy levels around the nucleus. Earnest Rutherford (foil) (1910) Fired beam of alpha particles ...

Chemistry Regents Review What was the first subatomic particle discovered? - The electron Ionic bonding is between a.. - metal and non metal The transfer of electrons from one atom to another is called - ionic bonding Which atoms are diatomic - BrINClHOF A gas is most ideal at what - low pressure and high temperature Partial charges are used in which type of bonding - ionic Which three things does hydrogen bond to - FON Lose Electrons- - Oxidation Gain Electrons- - Red...