The bohr model Study guides, Class notes & Summaries
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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 GCSE Chemistry Paper 1: Introduction to Chemistry. Exam Questions with Complete Solutions 2024/2025
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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...
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Chemistry Regents Review
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Chemistry Regents Review 
 
What was the first subatomic particle discovered? - The electron 
 
Ionic bonding is between a.. - metal and non metal 
 
The transfer of electrons from one atom to another is called - ionic bonding 
 
Which atoms are diatomic - BrINClHOF 
 
A gas is most ideal at what - low pressure and high temperature 
 
Partial charges are used in which type of bonding - ionic 
 
Which three things does hydrogen bond to - FON 
 
Lose Electrons- - Oxidation 
 
Gain Electrons- - Red...
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chem 141 exam 2 MSU Questions with 100% Correct Answers | Verified
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Describe the relationship between the frequency, wavelength, and velocity (speed) of a wave. - AnswerThe more times the wave is passing through a point in space = a higher frequency, the higher frequency 
creates a smaller wavelength, which is why the smallest wave is a gamma wave, it has the highest 
frequency and the shortest distance between waves, the velocity can be measured in m/s and is 
composed of frequency and wavelength 
Calculate any one (frequency, wavelength, or velocity) given the...
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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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ASTR Exam 2024 with 100% correct answers
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On oct 14, NYC will see the sun eclipsed about ____ % _____ than Burlington - correct answer 6, more 
 
Because of the moons eccentric orbit, the maximum change in its apparent diameter is closest to ____ % - correct answer 10 
 
The sun usually looks redder at sunset than at midday because ____ - correct answer you're looking through a longer path of atmosphere at sunset than at midday 
 
Annular solar eclipses cannot be seen - correct answer when the moon is near its perigee 
 
On average, th...
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2024 AQA GCSE Chemistry - Paper 1. Exam Questions with Complete Solutions Merged (Verified)
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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...
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Nuclear Medicine Physics question and answers rated A+ 2023 passed
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Nuclear Medicine Physics question and answers rated A+ 2023 passedBinding energy - correct answer min amount of energy required to "free" and electron from an atom. 
 
Unstable vs stable - correct answer stable-non radioactive 
unstable- radioactive 
 
Ionization - correct answer removal of an ELECTRON from an atom 
 
Excitation - correct answer electron absorbs enough energy to make it move to an UNOCCUPIED shell 
 
Strong nuclear force - correct answer energy used to hold particles inside th...
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MTTC integrated Sciences 094 physical sciences Correct 100%
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Plasma - ANSWER ionized gas that has some electrons that are described as free because they are not bound to an atom or molecule 
 
specific gravity - ANSWER measurement of the density of substances in a liquid compared to water 
 
atomic theory - ANSWER a theory that states that all matter is composed of tiny particles called atoms. 
 
John Dalton - ANSWER developed modern atomic theory 
 
negative ion - ANSWER anion, gains electrons 
 
positive ion - ANSWER cation; loses electrons 
 
ionic bon...
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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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