Plum pudding model Study guides, Class notes & Summaries

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...

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...

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) Millikin's oil...

GCSE CHEMISTRY Higher Tier Paper 1 Monday 22 May 2023 MorningTime allowed: 1 hour 45 minutes Materials For this paper you must have: • a ruler • a scientific calculator • the periodic table (enclosed). Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at the top of this page. • Answer all questions in the spaces provided. Do not write outside the box around each page or on blank pages. • If you need...

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

MSU CEM 141 FINAL EXAM WITH COMPLETE SOLUTIONS scientific question can be answered by doing experiments, making observation, taking measurements, etc. in a replicable way Lights acts as what? Particle and wave. scientific model drawing, graph, diagram, equation. represent many chemical entities. Wavelength The distance (m) of waves from peak to peak. Short: x-ray (red), long: infrared (blue) Short - higher energy Long - lower energy scientific theory A well tested concept t...

AQA GCSE CHEMISTRY 8462/1H Paper 1 Higher Tier Version: 1.0 Final *JUN2384621H01* IB/M/Jun23/E15 8462/1H For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 10 TOTAL Monday 22 May 2023 Morning Time allowed: 1 hour 45 minutes Materials For this paper you must have: • a ruler • a scientific calculator • the periodic table (enclosed). Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at...

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...

Section A Answer all questions in this section. 0 1 This question is about atomic structure. In the nineteenth century JJ Thomson discovered the electron. He suggested that negative electrons were found throughout an atom like ‘plums in a pudding of positive charge’. Figure 1 shows an atom of element R using the ‘plum pudding’ model. An atom of R contains seven electrons. Figure 1 0 1 . 1 State two differences between the ‘pl...

Mass Number - correct answer -total number of neutrons and protons in an atom; # protons + # electrons p - correct answer -Most nonmetallic elements are found in which block of the periodic table? Positive matter is concentrated in the central core - correct answer -Ernest Rutherford disproved J.J. Thomson's plum-pudding model of the atom by showing that... Potassium - correct answer -Plants use up copious amounts of which alkali metal, preventing most of it from being washed out to se...