Rutherford model Study guides, Class notes & Summaries
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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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TEST BANK FOR RADIOLOGIC SCIENCE FOR TECHNOLOGISTS 11TH EDITION BY BUSHONG
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MULTIPLE CHOICE 
 
 1. The term “atom” was first used by the ___________. 
a. Ethiopians 
b. British 
c. Greeks 
d. Romans 
 
 
ANS: C 
The term “atom” was first used by the Greeks 
 
DIF: Moderate REF: p. 27 
OBJ: Relate the history of the term “atom.” 
 
 2. The first person to describe an element as being composed of identical atoms was 
__________. 
a. J. J. Thomson 
b. John Dalton 
c. Dmitri Mendeleev 
d. Niels Bohr 
 
 
ANS: B 
The first person to describe an ele...
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AQA 2023 AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry questions and answers verified
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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 
...
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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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TEST BANK FOR CHEMISTRY –THE CENTRAL SCIENCE 15TH EDITION BY THEODORE | REAL TESTED EXAM QUESTIONS ANSWERED CORRECTLY | LATEST UPDATE
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TEST BANK FOR CHEMISTRY –THE CENTRAL 
SCIENCE 15TH EDITION BY THEODORE | REAL 
TESTED EXAM QUESTIONS ANSWERED 
CORRECTLY | LATEST UPDATE 
Chemistry: The Central Science, 15e (Brown, et al.) 
Chapter 2 Atoms, Molecules, and Ions 
2.1 Multiple-Choice Questions 
1) A molecule of water contains hydrogen and oxygen in a 1:8 ratio by mass. This is a statement 
of . 
A) the law of multiple proportions 
B) the law of constant composition 
C) the law of conservation of mass 
D) the law of conservat...
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AQA AS Physical Chemistry 2024 Exam Questions And Answers
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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...
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AQA AS Physical Chemistry 2024 exam questions with 100% correct answers
- Exam (elaborations) • 29 pages • 2024
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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...
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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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AQA AS Physical Chemistry Exam Questions and Answers
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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...
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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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