The bohr model Study guides, Class notes & Summaries

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...

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) -...

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...

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

mole - 6.022 x 10^23 things number of particles that allows us to convert from the molecular to the macroscopic level limiting reactant/reagent - amount of one of the reactants which limits how much product can be formed. smallest amount. percent yield - actual/theoretical x 100 electromagnetic radiation - wavelength - The distance between two corresponding parts of a wave. seconds/wave. 1/frequency. measured in m amplitude - Height of a wave frequency - waves/second. 1/wavelength. meas...

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...

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 ...

Atom the basic building block of matter that make up everyday objects Nucleus (atom) the center of an atom that contains the protons and neutrons Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:02 / 0:15 Full screen Electron Cloud the area around the nucleus of an atom where electrons are found Protons positive charged subatomic particles found in the nucleus Neutrons neutral charged subatomic particles fou...

On oct 14, NYC will see the sun eclipsed about ____ % _____ than Burlington - correct answer 6, more Because of the moons eccentric orbit, the maximum change in its apparent diameter is closest to ____ % - correct answer 10 The sun usually looks redder at sunset than at midday because ____ - correct answer you're looking through a longer path of atmosphere at sunset than at midday Annular solar eclipses cannot be seen - correct answer when the moon is near its perigee On average, th...