Millikan - Samenvattingen, Aantekeningen en Examens

ACS Chemistry Final Exam 182 Questions with Verified Answers Layout of an element (mass # & atomic #) - CORRECT ANSWER atomic number = - CORRECT ANSWER # of protons mass number = - CORRECT ANSWER # of protons + neutrons the number of protons in a neutral atom will equal the - CORRECT ANSWER # of electrons how to find the correct number of neutrons - CORRECT ANSWER mass number - atomic number Forms of the same elements that differ in amount of neutrons - CORRECT ANSWER isotopes...

law of conservation mass - correct answer mass is neither destroyed or created during ordinary chemical or physical reactions law of definite proportions - correct answer a chemical compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample or source of the compund law of multiple proportions - correct answer if two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element comb...

Plato - correct answer 430-347 BCE Aristotle - correct answer 384-322 BCE Democritus - correct answer 460-370 BCE Antoine Lavoisier - correct answer Joseph Proust - correct answer John Dalton - correct answer William Crookes - correct answer J.J. Thomson - correct answer Robert Millikan - correct answer Wilhelm Roentgen - correct answer Henri Becquerel - correct answer Ernest Rutherford - correct answ...

ACS Gen Chem 1 Exam Study Guide with Complete Solutions Extensive Property - ️️ Correct-Values that depend on how much you have Intensive property - ️️ Correct-Independent of size sample Density - ️️ Correct-Mass/volume Homogeneous mixture - ️️ Correct-Same throughout, indistinguishable parts Heterogeneous - ️️ Correct-Different parts, distinguishable parts Diatomic elements - ️️ Correct-N2, O2, H2, Cl2, Br2, I2 John dalton - ️️ Correct-Founded the atomic theo...

ACS Chemistry Final Exam Questions and Answers | 100% Pass Layout of an element (mass # & atomic #) - ️️ Correct- atomic number = - ️️ Correct-# of protons mass number = - ️️ Correct-# of protons + neutrons the number of protons in a neutral atom will equal the - ️️ Correct-# of electrons how to find the correct number of neutrons - ️️ Correct-mass number - atomic number Forms of the same elements that differ in amount of neutrons - ️️ Correct-isotopes What partic...

1) The scientist who determined the magnitude of the electric charge on the electron was A) John Dalton. B) Robert Millikan. C) J. J. Thomson. D) Henry Moseley. E) J. Burdge. Answer: B Difficulty: 1 Easy Topic: Components of Matter Bloom's: 1. Remember Subtopic: Structure of the Atom Gradable: automatic Accessibility: Keyboard Navigation 2) When J. J. Thomson discovered the electron, what physical property of the electron did he measure? A) its charge, e B) its charge-to-mass ra...

Chapter 01: Introduction 1. A tentative explanation for a set of observations that can be tested by further experimentation is referred to as A) a hypothesis. B) a law. C) a theory. D) none of the above. Ans: A Category: Easy Section: 1.2 2. A concise verbal or mathematical statement of a relationship between phenomena that is always the same under the same conditions is referred to as A) a hypothesis. B) a law. C) a theory. D) none of the above. Ans: B Category: Easy Section: 1.2 3. A un...

Democritus's atomic philosophy - correct answer - atoms were indivisible and indestructible - philosophers like Plato and Aristotle disagreed saying that everything was made out of the basic elemets Dalton's Atomic Theory - correct answer 1) elements are composed of atoms. 2) atoms of same element are identical, but differ from other elements. 3) elements can physically mis together to form mixtures or chemically combine in whole number ratios to form compound s 4) chemical ...

CHEM 121 Chapters 2 – 6 Answers CHEM 121 Chapter 2 Answers what is the law of conservation of mass (by Lavoisier) there is no change in mass when a chemical reaction occurs What is the law of definite proportions (by Proust) a compound always contains elements combined in the same proportion by mass Ex 1.000g of water (H2O) .111g of H and .889g of O ratio is always 1:8.01 what is the atomic theory of matter and who discovered it John Dalton all matter, whether element, compound...

Chapter 1—Living in a World of Chemistry MULTIPLE CHOICE 1. Which activity comes first in the scientific method? a. conclusion b. hypothesis c. experimentation d. observation ANS: D 2. Which is considered a physical science? a. physics b. biology c. zoology d. botany ANS: A 3. A scientist is trying to make a new insecticide that will be more toxic to flies, but less toxic to humans than insecticides now available. The scientist is engaged in a. basic research. b. applied research. ...