Cem 141 chapter 1 - Study guides, Class notes & Summaries
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CEM 141 CHAPTER 1 LEARNING OBJECTIVES WITH COMPLETE SOLUTIONS
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CEM 141 CHAPTER 1 LEARNING 
OBJECTIVES WITH COMPLETE 
 
SOLUTIONS 
 
Stable systems form when? The attractive forces and the repulsive forces are equal. 
 
Claim, evidence and reasoning for the existence of negatively charged particles in an atom. 
Claim: Electron's are negatively charged particles of an atom. 
Evidence: JJ's cathode ray. Electron's were ejected from the cathode, regardless of what the 
cathode was made of. 
Reasoning: Electrons must be negatively charged because they acceler...
CEM 141 Chapter 1 Questions And Answers Rated A+ New Update Assured Satisfaction
CEM 141 Chapter 1 Atoms Questions And Answers Rated A+ New Update Assured Satisfaction
CEM 141 Chapter 1 Learning Objectives Questions And Answers Rated A+ New Update Assured Satisfaction

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CEM 141 Chapter 1 Learning Objectives Questions with well explained answers
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PatrickKaylian
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Identify and explain the similarities and differences between atoms, molecules, elements, and 
compounds - Atoms: the smallest unit of ordinary matter that forms a chemical element 
Molecules: electrically neutral group of two or more atoms held together by chemical bonds. 
Elements: consists only of the same atoms, with the same number of protons 
Compounds: a chemical substance composed of atoms from 2+ elements held together by chemical 
bonds 
Make an argument(claim, evidence, reasoning) for...

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CEM 141 CHAPTER 1 LEARNING OBJECTIVES QUESTIONS WITH A GUARANTEED A+
- Exam (elaborations) • 4 pages • 2023
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PatrickKaylian
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Stable systems form when? - The attractive forces and the repulsive forces are equal. 
Claim, evidence and reasoning for the existence of negatively charged particles in an atom. - 
Claim: Electron's are negatively charged particles of an atom. 
Evidence: JJ's cathode ray. Electron's were ejected from the cathode, regardless of what the cathode 
was made of. 
Reasoning: Electrons must be negatively charged because they accelerate towards the anode. 
Claim, evidence and reasoning for the exist...

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CEM 141 Chapter 1-Question with Correct Answers/ Verified
- Exam (elaborations) • 5 pages • 2024
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MikeHarris
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Matter -️️- Made up of atoms 
Atoms -️️- Smallest distinguishable part of an element. 
We use models (mental and physical) -️️to represent many chemical entities 
We use different models -️️for different purposes 
Theories (such as atomic theory) -️️change over time according to the evidence available. 
All atoms and molecules attract each other -️️because of the attractive electrical forces 
between them 
Attractions -️️lower the potential energy of the system

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CEM 141 Chapter 1 Learning Objectives with Questions and correct answers
- Exam (elaborations) • 5 pages • 2024
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MikeHarris
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Identify and explain the similarities and differences between atoms, molecules, elements, and 
compounds - Atoms: the smallest unit of ordinary matter that forms a chemical element 
Molecules: electrically neutral group of two or more atoms held together by chemical bonds. 
Elements: consists only of the same atoms, with the same number of protons 
Compounds: a chemical substance composed of atoms from 2+ elements held together by 
chemical bonds 
Make an argument(claim, evidence, reasoning) for...

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CEM 141: Chapter 1 Atoms Exam Questions| Already answered| GRADED A+
- Exam (elaborations) • 8 pages • 2024
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lecturervince8
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can be a drawing or graph or a diagram or an equation, physical,mental - ANSWER-Scientific Model 
1.Claim(the target of your explanation) 
2.Evidence (the data or scientific principle you are using to support your claim) 
3.Reasoning (how the evidence support the claim) - ANSWER-Constructing a Scientific Explanation 
the best available explanation of the existing evidence or data or observations - ANSWER-Scientific 
Theory 
A law describes the phenomenon(tells you what). A theory explains the ph...

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Cem 141 Chapter 3 Origin of Atoms Exam Questions| Already answered| GRADED A+
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lecturervince8
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Cem 141 Chapter 3 Origin of Atoms 
Exam Questions| Already answered| 
GRADED A+ 
in an infinitely dense moment 13.8 billion years ago, the Universe is born from a singularity. - ANSWER- 
The Big Bang Theory 
true - ANSWER-If thermal energy is spreading out it will eventually cool 
a mysterious particle/force accelerates the expansion. - ANSWER-Inflation 
after 380,00 years; loose electrons cool enough to combine with protons. The Universe becomes 
transparent to light. The microwave background b...

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