Rutherford bohr - Study guides, Class notes & Summaries
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DAT General Chemistry Exam Solution.
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Atomic Number - correct answer number of protons found in that atom; low number; (Z) 
 
Mass Number - correct answer Protons + Neutrons; high number; (A) 
 
Atomic Mass - correct answer 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 = - correct answer 1.66x10^-24 
 
Atomic Weight - correct answer 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, w...
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CLEP Chemistry Review Practice Questions 2024.
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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 ...
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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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AQA AS Physical Chemistry 2024 exam questions with 100% correct answers
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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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RADT 1065 Chapter 2 Test Questions and Answers All Correct
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RADT 1065 Chapter 2 Test Questions and Answers All Correct 
 
How many atoms are there in one molecule of sodium bicarbonate (NaHCO3)? - Answer 6 
 
Which of the following physicists had a major part in describing the atom as we know it today? - Answer Bohr 
 
The periodic chart of elements is attributed to: - Answer Dimitri Mendeleev 
 
Rutherford made what significant contribution to science? - Answer description of the nuclear atom 
 
The difference between x-rays and gamma rays is: - An...
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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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AQA 2023 AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry questions and answers verified
- Exam (elaborations) • 23 pages • 2024
- Available in package deal
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- CA$18.49
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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 
...
-
CLEP Chemistry questions well answwred graded A+ 2023
- Exam (elaborations) • 15 pages • 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 2023 AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry questions and answers verified
- Exam (elaborations) • 23 pages • 2024
- Available in package deal
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- CA$21.34
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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 
...
-
AQA AS Physical Chemistry 2024 exam questions with 100% correct answers
- Exam (elaborations) • 16 pages • 2024
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- CA$20.63
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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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