First ionisation Study guides, Revision notes & Summaries

A-Level Edexcel Chemistry Exam Questions & Answers 2023/2024 how to test for C=C - ANSWER-decolourises bromine water Atomic Number - ANSWER-number of protons in the nucleus of an atom of that element. Mass Number - ANSWER-the sum of protons and neutrons in a nuclues of an atom Isotopes - ANSWER-atoms of the same elementwith the same numberof protons but different nuber of neutrons Relative Atomic Mass - ANSWER-the average mass of an atom of an element compared to a twelfth of the ...

TOF steps - CORRECT ANSWER-1) ionisation 2) acceleration 3) ion drift 4) detection 5) analysis Electron impact - CORRECT ANSWER-Sample vaporised and electron gun fires high energy electrons at it which knock off 1 electron from each particle, making them 1+ ions NB- can knock off more than one e or break molecular ion electrospray ionization - CORRECT ANSWER-Sample dissolved in volatile solvent then injected through needle to give fine mist which is attached to positive end of high v...

A Level Physical Chemistry AQA questions and answers 100% verified. 1 - ANS.relative mass of a proton 1 - ANS.relative mass of a neutron 1/1840 - ANS.relative mass of an electron +1 - ANS.relative charge of a proton 0 - ANS.relative charge of a neutron -1 - ANS.Relative charge of an electron strong nuclear force - ANS.How is the nucleus held together nuclear force - ANS.is the nuclear force or electrostatic force stronge...

TOF steps - 1) ionisation 2) acceleration 3) ion drift 4) detection 5) analysis Electron impact - Sample vaporised and electron gun fires high energy electrons at it which knock off 1 electron from each particle, making them 1+ ions NB- can knock off more than one e or break molecular ion electrospray ionization - Sample dissolved in volatile solvent then injected through needle to give fine mist which is attached to positive end of high voltage power supply, particles gain proton ...

A-Level Edexcel Chemistry Exam Questions & Answers 2023/2024 how to test for C=C - ANSWER-decolourises bromine water Atomic Number - ANSWER-number of protons in the nucleus of an atom of that element. Mass Number - ANSWER-the sum of protons and neutrons in a nuclues of an atom Isotopes - ANSWER-atoms of the same elementwith the same numberof protons but different nuber of neutrons Relative Atomic Mass - ANSWER-the average mass of an atom of an element compared to a twelfth of the ...

How is the wavelength of a photon related to its energy, frequency and wavenumber? correct answer: Energy - As the wavelength is shorter, there is more energy and vice versa Frequency - The frequency of photon increase, causing the wavelength to go down and vice versa Wavenumber - Is reciprocal to the wave length (1/a) Why are energy levels descrete correct answer: Because each energy level has its own energy pathway. How to calculate the wavelengths of light from one energy level to ...

first ionization energy - The energy required to convert one mole of gaseous atoms into gaseous atoms with a single positive charge standard enthalpy of formation - the enthalpy change when 1 mole of a compound is formed from its elements in their standard states under standard conditions Standard Enthalpy of Atomisation - The enthalpy change when one mole of gaseous atoms is formed from an element in its standard state Lattice enthalpy - The enthalpy change that occurs when one mole of a ...

Give the full electron configuration of an Al atom and a Cr3+ ion : 1s2 2s2 2p6 3s2 3p1 1s 2s2 2p6 3s2 3p6 3d6 Deduce the formula of the ion that has a charge 2+ with the same electron : Sr2+ Deduce the formula of the compound that contains 2+ ions and 3- ions that both have the same electron configuration as argon : CaP Deduce which of Na+ and Mg2+ is the smaller ion 2 marks : Mg 2+ Both have the same number of shielding however Mg2+ has more protons so higher nuclear charge and so...

Module 3 Model Questions And Answers State one benefit of adding chlorine to water (1) - Answer-Kills germs Suggest one possible hazard of adding chlorine to drinking water (1) - Answer-It is toxic Explain the decrease in the atomic radii across the period from Na to Cl (3) - Answer-1) nuclear charge increases 2) electron shielding remains the same 3) greater attraction to nucleus Describe and explain the trend, down the group, in the reactivity of the Group 2 elements with water (5) -...

Chemistry OCR A Module 3 test bank 2024 periodic trends in electron configurations across periods 2 and 3 each period starts with an electron in a new subshell *however across period 3 the 4s subshell fills first identify the s-block, p-block and d-block in the periodic table What is the first ionisation energy? The energy required to remove one electron from each atom in 1 mole of gaseous atoms of an element to form 1 mole of gaseous 1+ ions. What is the equation for ...