Avogadro constant Study guides, Class notes & Summaries

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 number (A) - ANSWERS The total number of protons and neutrons in the nuc...

AQA A-Level Chemistry Paper 1 – Inorganic and Physical Chemistry Predicted Paper 2023 with Marking scheme attached. Name …………………………………………………………………… Date ………………… 2 hours allowed You should have access to the AQA insert (periodic table and data sheet) to help with answering the questions. Grade boundaries These are VERY rough guesses! Getting a C on this paper does not guarantee you the same mark in the exam. ...

▪ mass - Ans .mr x moles ▪ Avogadro constant - Ans .6.02 x 10²³ ▪ conservation of mass - Ans .total mass of products = total mass of reactants ▪ volume - Ans .mol x 24dm³ ▪ concentration - Ans .mol / volume (dm³) ▪ percentage yield - Ans .yield from reaction/yield meant to be x 100 ▪ atom economy - Ans .mr of desired products/mr of all products(or reactants) x 100 ▪ endothermic - Ans .+ ▪ exothermic - Ans .- ▪ metal + acid --> - Ans .salt + hydrogen ▪ acid ...

▪ ISOTOPES - Ans .ATOMS OF THE SAME ELEMENT WITH DIFFERENT NUMBERS OF NEUTRONS ▪ ATOMIC (PROTON) NUMBER - Ans .NUMBER OF PROTONS IN THE NUCLEUS ▪ MASS (NUCLEON) NUMBER - Ans .NUMBER OF PARTICLES (PROTONS & NEUTRONS) IN THE NUCLEUS ▪ ION - Ans .A POSITIVELY OR NEGATIVELY CHARGED ATOM OR (COVALENTLY BONDED) GROUP OF ATOMS ▪ RELATIVE ISOTOPIC MASS - Ans .THE MASS OF AN ISOTOPE COMPARED WITH ON TWELTH OF THE MASS OF AN ATOM OFCARBON 12 ▪ RELATIVE ATOMIC MASS - Ans .THE WEIGHTE...

Student Exploration: Moles Vocabulary: atomic mass, Avogadro constant, conversion factor, dimensional analysis, mole, molar mass, molecular mass, scientific notation, significant figures, unified atomic mass unit Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. In the image to th...

past papers questions chemistry - November 2020 AS paper 1, 2017 paper 2 A level, paper 1 2019 A level Questions and Answers 100% Pass | Updated 2024 This question is about atomic structure.There is a general trend for an increase in ionisation energy across Period 3. Give one example of an element that deviates from this trend. Explain why this deviation occurs. - Correct Answer ️️ -Aluminium / Al(Outer) electron in (3)p orbital / sub-shell (level) (3p) higher in energy / slightly ...

AQA A Level Chemistry Definitions questions and answers latest top score. Relative Atomic Mass - ANS.The weighted mean mass of an atom of an element relative to 1/12 of the mass of one atom of carbon-12 First Ionisation energy - ANS.The energy required to remove an electron from each atom in one mole of gaseous atoms Acid - ANS.A species that is a proton donor Activation Energy - ANS.The minimum energy required to start a reaction by the brea...

AQA A-Level Chemistry - Amount of Substance Relative Atomic Mass The average mass of an atom of an element, compared to that of the mass of 1/12th of the average mass of an atom of carbon-12 Relative Molecular Mass one atom of carbon-12 Avogadro Constant The average mass of one molecule compared to 1/12th of the mass of The number of particles in one mole of an atom: 6.022 x 10^23 Solvent Solute Solution A liquid that can have a substance dissolved into it A...

Chapter 1—Molecular Reasons MULTIPLE CHOICE 1. Which of these is the best definition of matter? a. The pull of gravity on an object. b. Anything that has weight and volume. c. Anything that has mass and occupies space. d. Anything that is directly proportional to weight. e. The measure of the amount of space an object occupies. ANS: C PTS: 1 2. Which of these statements is correct? a. The amount of carbon on earth is essentially constant. b. The amount of carbon on earth fluctuates...

AQA A-Level Chemistry Paper 1 – Inorganic and Physical Chemistry Predicted Paper 2023 with marking scheme attached. Name …………………………………………………………………… Date ………………… 2 hours allowed You should have access to the AQA insert (periodic table and data sheet) to help with answering the questions. Grade boundaries These are VERY rough guesses! Getting a C on this paper does not guarantee you the same mark in the exam. ...