Where do atoms come from - Study guides, Class notes & Summaries
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WGU - C458 - Health, Wellness and Fitness Questions and Answers Already Passed
- Exam (elaborations) • 23 pages • 2023
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WGU - C458 - Health, Wellness and Fitness Questions and Answers Already Passed Amphetamines Uppers, stimulants. Legitimate and useful medical applications, but often abused. Example Ritalin for ADHD. Adderall for obesity, ADHD and narcolepsy. 
Ecstasy MDMA. Club drug often used at all night dance parties (raves). Stimulant that increases heart rate and blood pressure and can lead to heart or kidney failure; regular use produces long-lasting, perhaps permanent, damage to your brains ability to th...
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AQA AS Physical Chemistry Exam Questions and Answers
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AQA AS Physical Chemistry Exam 
Questions and Answers 
Who described atoms as solid spheres that make up different elements and when? - 
Answer- 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? - Answer- John Dalton in 1803 
Who discovered the electron and when? - Answer- JJ Thomson, 1897 discovered 
electrons proving atoms weren't indivisible or solid. 
New model named plum puddin...
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Texas Esthetician Written State Board Exam Review(The terms with " * " at the beginning of them are ones that I was tested on during my state board written, however I suggest studying all of these terms!! :)
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What is sanitation? 
A chemical process reducing the number of disease-causing germs on cleaned surfaces to a safe level. 
 
 
 
What is sterilization? 
COMPLETELY Destroys all microbial life, incl. spores 
 
 
 
* What is Disinfection? 
A chemical process that uses specific products to destroy harmful organisms 
 
 
 
What does OSHA stand for? 
Occupational Safety and Health Administration 
 
 
 
* What is OSHA responsible for? 
Addresses issues relating to handling, mixing, storing and disposi...
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2023 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/2H Chemistry Paper 2H Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]
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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 boxes at the top of this page. 
• Answer all questions in the spaces provided. 
• If you need extra space for your answer(s), use the lined pages at the end of 
this book. Write the question number against your answer(s). 
• Do all rough work in this boo...
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AQA AS Physical Chemistry 2024 exam questions with 100% correct answers
- Exam (elaborations) • 29 pages • 2024
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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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AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/2H Chemistry Paper 2H Version: 1.0 Final *JUN238464C2H01* IB/M/Jun23/E7 8464/C/2HQUESTION PAPER & MARKING SCHEME/ [MERGED] Marl( scheme June 2023
- Exam (elaborations) • 56 pages • 2024
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GCSE 
COMBINED SCIENCE: TRILOGY 
8464/C/2H 
Chemistry Paper 2H 
Version: 1.0 Final 
*JUN238464C2H01* 
IB/M/Jun23/E7 8464/C/2H 
For Examiner’s Use 
Question Mark 
1 
2 
3 
4 
5 
6 
TOTAL 
Tuesday 13 June 2023 Morning Time allowed: 1 hour 15 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 boxes at t...
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ACS General Chemistry 1 studysheet Exam 124 Questions with Verified Answers,100% CORRECT
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ACS General Chemistry 1 studysheet Exam 124 Questions with Verified Answers 
 
56=Mass # (A) 
26= Atomic # (Z) 
Fe= symbol - CORRECT ANSWER 56= 
26= 
Fe= 
 
Mass Number - CORRECT ANSWER Proton+ Neutrons 
 
Atomic Number - CORRECT ANSWER # of protons/electrons (equal in elemental form) 
 
- superscript - CORRECT ANSWER Add e- 
 
+ superscript - CORRECT ANSWER subtract e- 
 
Isotope - CORRECT ANSWER Diff number of neutrons 
 
Isomer - CORRECT ANSWER two or more compounds with the same # of elemen...
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CEM 141 MSU Final Exam All Possible Questions and Answers with complete solution
- Exam (elaborations) • 11 pages • 2023
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Yes because it can be tested and answered though observations and experiments - Consider the 
question: Is there an attractive force between a pencil and the earth? 
Is this a scientific question? [Yes or No] 
Because 
III. It can be tested and answered through observations and experiments 
IV. The answer is already known and we find it online 
V. There is no way to design an experiment to answer this question. 
Atoms are mostly empty space 
Atoms are in constant motion - Which of the following ...
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AQA AS level Chemistry exam 2024 questions with 100% correct answers
- Exam (elaborations) • 17 pages • 2024
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AQA AS level Chemistry exam 2024 questions 
with 100% correct answers 
Nucleons - ANSWERS Protons and neutrons 
Electrons (location) - ANSWERS Surrounding the nucleus 
Relative mass of an electron - ANSWERS 1/1840 
Strong nuclear force - ANSWERS The way protons and neutrons are held together in 
the nucleus 
Electrostatic forces - ANSWERS The attraction between protons and electrons that 
hold them together in the atom 
Atomic Number (Z) - ANSWERS The number of protons in the nucleus 
Mass nu...
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AQA AS Physical Chemistry Exam Questions and Answers
- Exam (elaborations) • 45 pages • 2024
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AQA AS Physical Chemistry Exam 
Questions and Answers 
Who described atoms as solid spheres that make up different elements and when? - 
Answer- 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? - Answer- John Dalton in 1803 
Who discovered the electron and when? - Answer- JJ Thomson, 1897 discovered 
electrons proving atoms weren't indivisible or solid. 
New model named plum puddin...
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