Isotopes Guides d'étude, Notes de cours & Résumés
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EPA Lead Inspector Exam With 100% Correct Answers 2023
- Examen • 10 pages • 2023
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Lead-based paint (LBP) - Correct answer-Any varnish, shallac, or coating that contains 
either- 1.0 mg/cm2 - 0.5 % by weight - 5000 ppm - Older instruments could not read 
accurately at 0.7, so the lead standard was updated to 1.0 
Dust sample clearance values - Correct answer-- Floors: 40 μg/ft2 > 10 μg/ft2 (10 μg/ft2 
in NY) - Windows: 250 μg/ft2 > 100 μg/ft2 (50 μg/ft2 in NY) - Window wells (troughs): 
400 μg/ft2 (100 μg/ft2 in NY) - Samples must be at 1 sq ft > 2 sq ft (can ...
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CLEP Chemistry Latest Update Graded A
- Examen • 25 pages • 2023
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CLEP Chemistry Latest Update Graded A John Dalton 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 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 Calculated the charge-to-mass ratio of electrons using oil drops falling in ...
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General Chemistry ACS Final Exam (2024) All Correct.
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Protons correct answers defines the element; positive charge; equal to the atomic number 
 
Neutrons correct answers equal to mass number-number of protons; neutral charge 
 
Electrons correct answers negative charge; dependent on the charge of the atom 
 
Cations correct answers Positively charged ions 
 
Anions correct answers Negatively charged ions 
 
Isotopes correct answers when the number of neutrons varies but it has the same number of protons ex) Ne-20 and Ne-22` 
 
What was believed un...
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Isotopes (Gizmo) Latest 2023 Graded A+
- Examen • 1 pages • 2023
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Isotopes (Gizmo) Latest 2023 Graded A+ Given the following table, which statement is true about atoms A and B? A. A and B are isotopes of the same element 
How many protons and neutrons does iron-56 have? D. 26 protons and 30 neutrons 
Which of the following is the correct for an isotope with 3 protons and 5 neutrons? C. 8/3 Li 
Which of the following is the most stable isotope? D. Plutonium-238 
As the mass of the nucleus increases, what happens to the ratio of neutrons to protons in stable iso...
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Straighterline Chemistry Final Exam (ACTUAL) 2023/2024 Questions and Answers
- Examen • 46 pages • 2023
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Straighterline Chemistry Final Exam (ACTUAL) 
 
What is the term used for findings that are summarized based on a pattern or trend? 
a.	Law 
b.	Hypothesis 
c.	Theory 
d.	Phenomena 
e.	Prediction - Answer a. Law 
 
Which of the following is a tentative explanation for a set of observations? Select one: a. Law 
b.	Hypothesis 
c.	Theory 
d.	Phenomena 
e.	Prediction - Answer b. Hypothesis 
 
If a liquid contains 60% sugar and 40% water throughout its composition then what is it calle...
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ALMS- Radiation Safety Exam | 25 Questions with 100% Correct Answers | Updated & Verified
- Examen • 5 pages • 2022
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Which of the following is 
composed of a single central 
nucleus? - ANS - A-Correct 
What is the time it takes a 
radioactive isotope to transform 
50 percent of its atoms by 
radioactive decay? - ANS - C-Correct 
Which is a form of non-nuclear 
radiation? - ANS - A-Incorrect 
What is the SI (international) unit 
for activity? - ANS - A-Correct 
RADIAC instruments that collect 
and measure the ion pairs 
created when radiation interacts 
with matter utilizes which 
operating principle? - ANS - D...
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APHY 101 Ivy Tech Exam 1/ Midterm questions with complete solutions 2023
- Examen • 10 pages • 2023
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AQA AQA GCSE CHEMISTRY 8462/1F Paper 1 Foundation Tier Version: 1.0 Final *JUN2384621F01* IB/M/Jun23/E11 8462/1FQUESTION PAPER & MARKING SCHEME/ [MERGED] Marl( scheme June 2023
- Examen • 63 pages • 2024
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AQA 
GCSE 
CHEMISTRY 
8462/1F 
Paper 1 Foundation Tier 
Version: 1.0 Final 
*JUN2384621F01* 
IB/M/Jun23/E11 
8462/1F 
For Examiner’s Use 
Question Mark 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
TOTAL 
Monday 22 May 2023 Morning Time allowed: 1 hour 45 minutes 
Materials 
For this paper you must have: 
• a ruler 
• a scientific calculator 
• the periodic table (enclosed). 
Instructions 
• Use black ink or black ball-point pen. 
• Pencil should only be used for drawing. 
• Fill in the box...
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Atoms and Isotopes Questions with 100% Correct Answers | Verified | Latest Updated 2024
- Examen • 2 pages • 2024
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Atoms and Isotopes Questions with 100% Correct Answers | Verified | Latest Updated 2024
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AC-HPAT Chemistry Study Guide 2023 with complete solution
- Examen • 8 pages • 2023
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AC-HPAT Chemistry Study Guide 2023 with complete solution 
 
double-displacement reaction 
A double displacement reaction, also known as a double replacement reaction or metathesis, is a type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products 
Precipitate 
precipitate is an insoluble solid that emerges from a liquid solution. The emergence of the insoluble solid fro...
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