Unit 1: Atomic Structure Quiz 3.5 / 5 based on 5 ratings ? ChemistryStructureASAQA Created by: rosieevieCreated on: 12-10-13 15:56 Who discovered the neutron? James Chadwick 1 of 15 What is the relative mass of an electron? 1/1840 2 of 15 What is the relative charge of a proton? +1 3 of 15 How many electrons does the 2nd electron shell hold? 8 4 of 15 What is the isotope of an element? Atoms with the same numbers of protons but different numbers of neutrons 5 of 15 The relative atomic mass is the weighted mass of an atom of an element compared to an atom of what? Carbon-12 6 of 15 What does a mass spectrometer measure? The relative atomic mass and the relative abundance of different isotopes 7 of 15 What is used to remove the electrons of atoms in a mass spectrometer? An electron gun 8 of 15 How many electrons can each electron orbital hold? 2 9 of 15 What type of spin will two electrons in the same orbital have? Opposite 10 of 15 The highest energy electrons are lost when an ion is formed except for when the electron is in which electron orbital? 4s 11 of 15 In what state must an atom be in to measure it's 1st ionisation energy? Gas 12 of 15 Why does general trend increase for the 1st ionisation energies across a period? Increased nuclear charge 13 of 15 What is the cause for a large increase in ionisation energy of an atom? The electrons get closer to the nulceus 14 of 15 What is the general trend for ionisation energy down a group? Decreasing 15 of 15
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