Subatomic model of matter - Study guides, Class notes & Summaries
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chem 111 study guide Already Graded A+
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sig fig zeros - Answer-1. zeros at beginning NOT signif 
2. zeros between ARE SIGNIF 
3. zeros at end of number are signif if number contains a decimal point 
3.489 x (5.67-2.3) - Answer-3.489 x 3.(3)7 
11.75793 
12 
matter - Answer-composed of mass and must occupy space 
scales of matter - Answer-macroscopic, microscopic, particulate. scientists think on a particulate 
scale, observe macroscopically 
states of matter - Answer-1. change from solid to liquid to gas as temp increases 
2. motion of...
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TEST BANK FOR CHEMISTRY –THE CENTRAL SCIENCE 15TH EDITION BY THEODORE | REAL TESTED EXAM QUESTIONS ANSWERED CORRECTLY | LATEST UPDATE
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TEST BANK FOR CHEMISTRY –THE CENTRAL 
SCIENCE 15TH EDITION BY THEODORE | REAL 
TESTED EXAM QUESTIONS ANSWERED 
CORRECTLY | LATEST UPDATE 
Chemistry: The Central Science, 15e (Brown, et al.) 
Chapter 2 Atoms, Molecules, and Ions 
2.1 Multiple-Choice Questions 
1) A molecule of water contains hydrogen and oxygen in a 1:8 ratio by mass. This is a statement 
of . 
A) the law of multiple proportions 
B) the law of constant composition 
C) the law of conservation of mass 
D) the law of conservat...
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General Chemistry Placement Test, With Complete Solutions Updated | 20242024.
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General Chemistry Placement Test, With Complete Solutions Updated | 20242024. 
 
 
 
 
 
molecule	two nonmetal atoms combined form a covalent compound called a 
diatomic molecules	H2,O2,F2 
Matter	Anything that has mass and takes up space 
Element	A substance that cannot be broken down into simpler substances 
Compound	A pure substance made of two or more elements CHEMICALLY combined. 
Compound	Can be decomposed by chemically 
Mixture	A PHYSICAL blend of two or more components 
(aq)	aqueous mi...
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TEST BANK FOR CHEMISTRY –THE CENTRAL SCIENCE 15TH EDITION BY THEODORE | REAL TESTED EXAM QUESTIONS ANSWERED CORRECTLY | LATEST UPDATE
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TEST BANK FOR CHEMISTRY –THE CENTRAL 
SCIENCE 15TH EDITION BY THEODORE | REAL 
TESTED EXAM QUESTIONS ANSWERED 
CORRECTLY | LATEST UPDATE 
Chemistry: The Central Science, 15e (Brown, et al.) 
Chapter 2 Atoms, Molecules, and Ions 
2.1 Multiple-Choice Questions 
1) A molecule of water contains hydrogen and oxygen in a 1:8 ratio by mass. This is a statement 
of . 
A) the law of multiple proportions 
B) the law of constant composition 
C) the law of conservation of mass 
D) the law of conservat...
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Biology 111 Exam 1- TAMU Latest Update Graded A
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Biology 111 Exam 1- TAMU Latest Update Graded A 
Domain Archaea Prokaryotic, single-celled organisms; have cell walls; reproduce using binary fission (duplication); RNA sequence is most similar to Eukarya; live in extreme environments and therefore do not infect humans; oldest life forms; include methanogens, extreme thermophiles, and extreme halophiles. 
Domain Bacteria Prokaryotic, single-celled organisms; have cell walls; reproduce using binary fission; differ from archaea in environment and ...
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Earth and Space Science Praxis 2 Exam 2023
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Earth and Space Science Praxis 2 
Exam 2023 
Mercator Projection - ANS-Cylinder; shows entire Earth; distorts POLES 
Polyconic Projection - ANS-Cone; landmasses close to accurate; accurate where sheet 
touches 
Gnomic Projection - ANS-sheet (over any point); used for poles; distorts LANDMASSES 
Telescope - ANS-optical instrument used to observe objects by collecting 
electromagnetic radiation 
Spectroscopy - ANS-Branch of science; Investigates and measures spectra produced 
when matter intera...
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Abeka Chemistry test 1 fully solved exam study guide 2024-2025(100% accurate expert solutions)download to pass
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K 
potassium 
 
 
 
isotopes 
what are the atoms that have the same number of protons but different number of neutrons? 
 
 
 
 
Brainpower 
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proton 
the number of which type of particle identifies an atom as a given element? 
 
 
 
electrons 
which subatomic particle is NOT found in the nucleus of an atom? 
 
 
 
organic chemist 
what type of chemist would most likely study alcohols, ...
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CEM 141 Final Exam Questions & Answers Solved 100% Correct!!
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Why are alpha particles deflected by the nucleus? - Answer-Because both the alpha particles and the 
nucleus are positively charged and so the alpha particle is repelled. 
Is this statement (Dalton's Theory) true or false and why? 
"All atoms of an element are identical and have the same mass and properties." - Answer-False. 
Atoms of the same element can have different numbers of neutrons. 
What is the evidence that electrons are subatomic particles? - Answer-The nature of the electron is 
i...
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Atomic Theory Questions & Answers
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Atomic Theory Questions & Answers 
Democritus - Answer-Proposed concept of atoms without experimental evidence 
John Dalton - Answer-Developed atomic theory based on experimental evidence 
Dalton's Atomic Theory - Answer-Elements made of indivisible atoms, atoms rearrange in chemical 
reactions, compounds form in simple ratios 
Aristotle - Answer-Denied atomic theory, argued for continuous, non-divisible matter 
Errors in Dalton's Atomic Theory - Answer-Atoms are divisible, not all atoms of a...
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CEM 141 Chapter 1 Learning Objectives Questions with well explained answers
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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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