Bohr atom Study guides, Class notes & Summaries
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DAT General Chemistry Exam Questions Correctly Answered.
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DAT General Chemistry Exam Questions Correctly Answered. 
 
 
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 weighte...
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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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PHYSICS FINAL EXAM 2024 WITH CORRECT ANSWERS AND MULTIPLE QUESTIONS
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Matter is measured in _____. - kilograms 
 
Energy is measured in? - joules or electron volts 
 
Atoms and molecules are the fundamental building blocks of? - matter 
 
Radio waves, light and x-rays are all examples of ____energy. - Electromagnetic 
 
A moving object has _____ energy. - kinetic 
 
The energy of x-rays is _____. - electromagnetic 
 
The basic quantities measured in mechanics are _____, _____, and _____. - mass, length, time 
 
An example ...
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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 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 Solution.
- Exam (elaborations) • 16 pages • 2024
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Available in package deal
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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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OCR 2023 GCSE Combined Science Physics A Gateway Science J250/11: Paper 11 (Higher Tier) Question Paper & Mark Scheme (Merged)
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2 
© OCR 2023 
Section A 
You should spend a maximum of 20 minutes on this section. 
Write your answer to each question in the box provided. 
1 Which new feature of the atomic model did Niels Bohr suggest? 
A Electrons are in stable shells. 
B Electrons orbit a nucleus. 
C The atom has a nucleus. 
D The nucleus is positive. 
Your answer [1] 
2 Two rooms have the same fixed volume. They contain identical gases at the same pressure. 
Room H is at a higher temperature than room L. 
Which statement...
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Biology 1001 (J. Cordes) Questions and Answers Already Passed
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Biology 1001 (J. Cordes) Questions and 
 
Answers Already Passed 
 
1. **What was the chemical explanation for the incident involving Ms. Ramirez on February 19, 
1994, at Riverside Hospital?** 
- Dimethyl sulfoxide (DMSO) applied to Ms. Ramirez's skin converted to dimethyl 
sulfone, which then broke down into dimethyl sulfate and vaporized during a blood draw. 
 
2. **According to the article "Death Beds," what percentage of healthcare professionals neglect 
proper hand hygiene between pati...
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ACS GEN CHEM 1 FINAL Exam 166 Questions with Verified Answers,100% CORRECT
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ACS GEN CHEM 1 FINAL Exam 166 Questions with Verified Answers 
 
The physical material of the universe. It is anything that has mass and occupies space. - CORRECT ANSWER Matter 
 
is made up of relatively few elements. - CORRECT ANSWER Matter 
 
The smallest building block of matter. Smallest particle that retains the chemical property of the element (O, He, S). - CORRECT ANSWER Atom 
 
Each _______ is made of the same kind of atom - CORRECT ANSWER Element 
 
Combination of atoms held together i...
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LRA 211 Certification Exam Questions and CORRECT Answers
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Joseph (JJ) Thomson - Developed "plum pudding model" 
Interactions in x-ray tube - Happen at atomic level 
Ernest Rutherford - Model resembling tiny solar system 
Niels Bohr - Atoms have 3 particles Protons, Neutrons, and electrons 
binding energy - Energy needed to split up and atom 
Electron binding energy depends on - How close the electron is to the nucleus and how 
many protons are in the atom
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