Plum pudding model - Study guides, Class notes & Summaries

Matter Anything that has mass and takes up space; made of atoms Atoms Basic unit of matter which cannot be broken down and contain mostly empty space; contains three parts: the electron, proton, and neutron Elements A pure substance that contains only one type of atom Compound Two or more elements that are chemically bonded; includes ionic and covalent Mixture Two or more substances that are together but not bonded Pure Substance TestTrackers: Unlock Your Exam Potential! | Qual...

1 Cal=1 Kcal 1000 cal 4.184 kJ JJ Thomsondiscovered the electron, plum pudding model R.A. Millikandiscovered electron mass Oil drop experiment RutherfordDiscovered the nucleu

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 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...

Gen Chem 1 Final Exam Review – Saylor Questions and Answers Which of the following is a correct feature of the nuclear atom proposed by Rutherford? A) The atom is mostly empty space, most of the mass of an atom is concentrated in its nucleus. B) All atoms of an element have the same mass. C) It is like the "plum pudding" model. D) The majority of alpha particles to strike the foil "bounded back" E) The number of neutrons and electrons in the atom are equal. The atom is mostl...

Atom definition The smallest component of an element Compound Two or more elements, chemically joined in fixed proportions. They can only be separated by chemical means. Mixture Two or more elements/compounds which are not chemically combined. Ways to separate mixtures - Filtration - Evaporation - Crystallisation - Simple distillation - Fractional distillation - Paper chromatography The plum and pudding model Before electrons were discovered, people thought that atoms were indivi...

What is an atom? - Ans .Smallest part of an element that can exist ▪ What is an element? - Ans .A substance made up of one type of atom ▪ How are elements represented? - Ans .Using symbols, in the periodic table ▪ Approximately how many elements are there? - Ans .100 ▪ What is a compound? - Ans .A substance made up of two or more elements chemically combined in fixed proportions ▪ How are the elements in a compound separated? - Ans .By chemical reaction ▪ How are chemical rea...

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...

Describe the plum pudding model - A ball of positive charge with negative electrons in embedded in it Who disproved the plum pudding model and how? - Rutherford and Geiger + Marsden By conducting the gold foil experiment. Positively charged alpha particles were fired at a very thin sheet of gold foil. If the plum pudding model was correct then the charged particles would have mostly deflected off the gold foil, but most of the particles passed straight through

2024 Newest |Chemistry 210 Exam 1| UPDATE|COMPREHENSIVE FREQUENTLY MOST TESTED QUESTIONS AND VERIFIED ANSWERS|GET IT 100% ACCURATE Ionization energy - ANSWER-the energy required to remove an electron from an atom Electron affinity - ANSWER-energy change when an atom gains an electron Ion - ANSWER-An atom that has a positive or negative charge. Photoelectric effect - ANSWER-The emission of electrons from a metal when light shines on the metal Dual nature of light - ANSWER-Light has proper...