Ldfs - Study guides, Class notes & Summaries

Atoms - Matter is made up of Atom - The the smallest distinguishable part of an element Theories - Can change overtime according to the evidence available Electrostatic forces - ALL atoms/molecules attract to one another due to Attractions - ________ lower potential energy of a system Repulsions - _____ raise potential energy of a system The attractive and repulsive forces are EQUAL or the potential energy is at a minimum - Stable systems form where The well - The most stable part of a g...

Which has a larger atomic radius? Mg or Ar? Why? A. Mg, because it is a metal. B. Mg, because its valence electrons are not as strongly attracted towards the nucleus as those in Ar. C. Ar, because it is a heavier element. D. Ar, because it has more electrons and they repel each other. - Answer B Out of Na+, Mg2+, Ne, and F- which has the smallest radius? A. Na+ B. Mg2+ C. Ne D. F- - Answer B When and where were the carbon and oxygen atoms in your body created? A. In plants as they wer...

Why are alpha particles deflected by the nucleus? - 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." - False. Atoms of the same element can have different numbers of neutrons. What is the evidence that electrons are subatomic particles? - The nature of the electron is independent of the mat...

Chem 104 1st exam|Complete Questions with 100% Correct Answers What are hybrid orbitals? orbitals of equal energy produced by the combination of two or more orbitals on the same atom What are the types of hybrid orbitals SP- 2 regions of density SP^2- 3 regions of density(3sp^2s) SP^3- 4 regions (4 sp^3s) What are the 4 types of hydrocarbons alkanes, alkenes, alkynes, and aromatic hydrocarbons Alkane a hydrocarbon containing only single covalent bonds Alkene a hydrocarbon that contai...

3-D extended continuous network (shown on tables in notes in red); continuous materials have higher boiling and melting points than discrete -️️What are continuous materials? small atoms/molecules (shoes on tables in notes in black) -️️What are discrete materials? H2: LDF He: LDF Li: metallic bonds (no LDFs in metals) move metal cores relative to one another c: covalent -️️Using the table found on lecture 25 slide 13 what kinds of interactions must be overcome in order to melt...

-It is impossible to predict from the information provided, the color of the product does not depend on the color of the reactant(s) since the properties of the product are emergent -️️A compound that is red in color reacts with a compound that is yellow in color to make a product. At room temperature, what color will the product be and why? Energy is absorbed into the system and interactions between the molecules are overcome - ️️What happens to the system when a molecular substanc...

UNE - Chem 1011 - Midterm Study Guide 2023/2024 already graded A+

the electrostatic repulsion between e- means that the atoms are forced apart, since energy was used to "push" e- together (in the form of KE) this energy must be stored in the electrostatic field as PE - ANSWER-as atoms get closer together and their e- clouds overlap, why does PE rise? the strength of the attractive forces = the strength of repulsive forces (allows stable interaction to occur) - ANSWER-what forces are present/respective strengths at potential minimum? the deeper the well,...

CHEM MISC General Chemistry I Spring 2020 – Exam 3 Version A Questions and Answers Instructions: 1. Do NOT open this exam until you are told to do so. Opening the exam before the start of the exam is considered an act of Academic Dishonesty. 2. All answers must be bubbled into the scantron answer sheet. 3. No credit will be given for answers written on this exam. 4. You must use a #2 pencil to bubble in the answers on your scantron. 5. This is a multiple-choice exam consisting of 31 ...

Which of the following processes would you expect the entropy of the system to decrease? I. evaporating a liquid II. decreasing the temperature of a gas III. melting a solidII only The boiling point of pure methanol (CH3OH) is 338K and the boiling point of pure ethanol (CH3CH2OH) is 351K why is the boiling point of ethanol higher than methanol? a. because ethanol forms more hydrogen bonding interactions per molecule than methanol. b. because ethanol has a larger electron cloud and ther...