Rutherford Study guides, Class notes & Summaries
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Straighterline CHEM101 Final exam 2023 with 100% correct answers
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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...
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CEM 141 MSU Exam 1 Questions and Answers Already Passed
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CEM 141 MSU Exam 1 Questions and 
 
Answers Already Passed 
 
The statement "If I add cold milk to hot coffee the temperature will decrease," is a? Claim, 
always include an explanation and reasoning to the claim. 
 
Scientific Model Models are used to make testable predictions 
 
How much is a picometer? 0.1 x 10^-12 meters 
 
Atomic Force Microscopy/ Scanning Tunneling Microscopy Microscopes that now allows us 
to view atoms. 
 
Leaves are green in the summer because? A plant's leaves are g...
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IRRSP QUESTIONS AND ANSWERS GUARANTEED A+
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IRRSP QUESTIONS AND ANSWERS GUARANTEED A+ 
CHAPTER 1 
 
D. All the above 
1. In the early years of Radiography, what caused personnel to be overexposed? 
 
A. Poor equipment design 
B. Lack of understanding 
C. Lack of and poor safety practices 
D. All the above 
 
 
 
D. Late in 1898 
2. In what year did Marie Curie discover Radium? 
 
A. The beginning of 1896 
B. The end of 1897 
C. The beginning of 1898 
D. Late in 1898 
 
 
 
 
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CLEP Chemistry questions well answwred graded A+ 2023
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CLEP ChemistryJohn 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 the charge-to-mass ratio of electr...
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GCSE EDEXCEL TRIPLE SCIENCE CHEMISTRY PAPER 2 2024/2025 QUESTION PAPER ALREADY PASSED
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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) -...
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DAT General Chemistry Exam |170|questions with complete solution
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DAT General Chemistry Exam |170|questions with complete solution 
Atomic Number ANS-number of protons found in that atom; low number; (Z) 
 
Mass Number ANS-Protons + Neutrons; high number; (A) 
 
Atomic Mass ANS-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 = ANS-1.66x10^-24 
 
Atomic Weight ANS-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, ...
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Straighterline CHEM101 | 314 Questions with 100% correct answers | Verified
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Mass Number - total number of neutrons and protons in an atom; # protons + # electrons 
p - Most nonmetallic elements are found in which block of the periodic table? 
Positive matter is concentrated in the central core - Ernest Rutherford disproved J.J. Thomson's 
plum-pudding model of the atom by showing that... 
Potassium - Plants use up copious amounts of which alkali metal, preventing most of it from being 
washed out to sea? 
2:1:1:2 - What is the ratio of reactants and products in the che...
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OCR B Salters Chemistry exam 2023 with 100% correct answers
- Exam (elaborations) • 14 pages • 2023
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History of the atom correct answersSolid sphere 
Johnson - Plum pudding (-ve electrons) 
Rutherford - fired alpha particles at thin gold sheet, a few were deflected backwards - tiny +ve nucleus, surrounded by cloud of -ve electrons 
Electrons in shells/ energy levels 
 
Percentage yield equation correct answersactual yield/theoretical yield x 100 
 
Making new concentrations equation correct answersvol to use = final conc/initial conc x vol required 
 
Acid-alkali titrations correct answersUse p...
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Chem 1311 17F Exam 1 UTD Definitions and trends Questions With Complete Solutions
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Atom correct answer: Smallest quantity of matter that retains the properties of matter. Building blocks of all matter 
 
Element correct answer: A substance made up of a single type of atom. 
 
α Particle correct answer: A positively charged particle consisting of two protons and two neutrons, emitted in radioactive decay or nuclear fission. 
 
β Particle correct answer: High-speed electron, especially emitted in radioactive decay 
 
γ Rays correct answer: high-energy electromagnetic rad...
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OCR B Salters Chemistry exam 2023 with 100% correct answers
- Exam (elaborations) • 14 pages • 2023
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History of the atom correct answersSolid sphere 
Johnson - Plum pudding (-ve electrons) 
Rutherford - fired alpha particles at thin gold sheet, a few were deflected backwards - tiny +ve nucleus, surrounded by cloud of -ve electrons 
Electrons in shells/ energy levels 
 
Percentage yield equation correct answersactual yield/theoretical yield x 100 
 
Making new concentrations equation correct answersvol to use = final conc/initial conc x vol required 
 
Acid-alkali titrations correct answersUse p...
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