Niels bohr Study guides, Class notes & Summaries
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UPDATED GCSE EDEXCEL TRIPLE SCIENCE CHEMISTRY PAPER 2 2024/2025 QUESTION PAPER ALREADY PASSED
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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) - formula - answer CO3 (2-) 
Sulfate (ion) - formula - answer SO4 (2-) 
What do you leav...
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AQA GCSE Chemistry - Paper 1 Exam Questions with 100% Correct Answers
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What is the charge of a proton? - ANSWER-+1 
 
What is the charge of a neutron? - ANSWER-0 
 
What is the charge of an electron? - ANSWER--1 
 
What is the relative mass of a proton? - ANSWER-1 
 
What is the relative mass of a neutron? - ANSWER-1 
 
What is the relative mass of an electron? - ANSWER-Very small 
 
How many types of atoms do elements contain? - ANSWER-Only one type 
 
What are compounds? - ANSWER-Substances containing two or more different elements that are chemically bonded toge...
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ARMRIT Exam Questions & Answers Latest Updated
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The area in Asia that first discovered magnets is known as? - Answer Magnesia 
 
The first magnets were called magnetites because the people that lived in the area where they were found were known as? - Answer Magnetes 
 
For centuries, sailors use magnets for which of the following purposes? - Answer To navigate the seas 
 
Which of the following people named the ends of the magnet north and south poles? - Answer Petrus peregtinus de Maricourt 
 
In 1825, the British scientist, William Surgeon,...
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Chemistry AQA a LEVEL AS PAPER 1 2024 UPDATE GRADED A+
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Chemistry AQA a LEVEL AS 
PAPER 1 2024 UPDATE 
GRADED A+ 
what are the three fundamental particles that make up an atom? - 
CORRECT ANSWER-protons, neutrons and electrons 
nucleus - CORRECT ANSWER-- most of mass of atom is 
concentrated in the nucleus 
- the diameter of the nucleus is rather titchy compared to the whole 
atom 
- protons and neutrons are sometimes found in the nucleus 
electrons - CORRECT ANSWER-- electrons have a -1 charge 
- they surround the nucleus 
- the orbitals take up mos...
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Grade 11 Chemistry Final Exam Simplified Question And Answers 100% Correctly Solved.
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Element - correct answer A pure substance that can't be broken down into simpler substances by chemical means; a substance composed of entirely one kind of atom. 
 
Compound - correct answer A pure substance that can be broken down by chemical means to produce two or more pure substances; a substance containing atoms of more than one element combined in fixed proportions 
 
Metal - correct answer Element that is a conductor of electricity, malleable, ductile and lustrous 
 
SATP - correct answe...
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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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TEST BANK FOR RADIOLOGIC SCIENCE FOR TECHNOLOGISTS10TH EDITION BY BUSHONG
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Chapter 2: The Structure of Matter 
Test Bank 
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: page 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 element ...
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MTTC Integrated Sciences 094 Physical Sciences Actual Exam With Verified Solutions
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MTTC Integrated Sciences 094 Physical 
Sciences Actual Exam With Verified 
Solutions 
Plasma - CORRECT ANSWER-ionized gas that has some electrons that are described 
as free because they are not bound to an atom or molecule 
specific gravity - CORRECT ANSWER-measurement of the density of substances in a 
liquid compared to water 
atomic theory - CORRECT ANSWER-a theory that states that all matter is composed of 
tiny particles called atoms. 
John Dalton - CORRECT ANSWER-developed modern ato...
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MRI Study guide Questions and Answers 2023
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MRI Study guide Questions and Answers 2023 
MRI visible radiation reflects from the body 
1. Visible light reflects off an object 
2. reflected light detected by a that is sensitive to that kind of radiation - a RETINA 
 
 
 
MRI photograph is madeby 
1. with reflex/refraction 
2. electromagnetic radiation and receptors 
3. visible lights extends from approximately 400 nm (blue) to 700 nm (red) 
 
 
 
x ray image radiation is transmitted through the body 
1. electromagnetic radiation shines on a...
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TEST BANK FOR CHEMISTRY: AN ATOMS FIRST APPROACH, 2ND EDITION BY STEVEN S. ZUMDAHL | COMPLETE CHAPTER 1-21
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Chapter 1 - Chemical Foundations 
1. Consider the element indium, atomic number 49, atomic mass 114.8 g. The nucleus of an atom of indium-112 
contains: 
a. 49 protons, 63 neutrons, 49 electrons. 
b. 49 protons, 49 neutrons. 
c. 49 protons, 49 alpha particles. 
d. 49 protons, 63 neutrons. 
e. 49 protons, 112 neutrons. 
ANSWER: d 
POINTS: 1 
2. A hypothetical element consists of two isotopes of masses 78.95 amu and 80.95 amu with abundances of 
32.9% and 67.1%, respectively. What is the average a...