Chemistry Atomic Structure A-Level 0.0 / 5 ? ChemistryAtomic structureA2/A-levelAQA Created by: keira.graceCreated on: 29-06-21 13:40 What does an atom consist of? A nucleus containing protons and neutrons, surrounded by electrons. 1 of 14 What is the relative atomic mass of a proton, neutron and an electron? 1,1 and 1/1840 2 of 14 How do the number of protons and electrons differ in an atom? They are the same because atoms have a neutral charge. 3 of 14 What force s holds an atomic nucleus together? Strong nuclear force. 4 of 14 What is the atomic number? The number of protons + the number of neutrons 5 of 14 What is the mass number? Number of protons + number of neutrons 6 of 14 What is an isotope? An atom with the same number of protons but different number of neutrons. 7 of 14 Whats an ion? A charged atom. 8 of 14 What is the function of a mass spectrometer? It accurately determines the mass and abundance of separate molecules/ atoms to help with identification. 9 of 14 What is a mass spectrum? The output from a mass spectrometer that shows the different isotopes that make up an element. 10 of 14 What is the total number of electron that each electron shell may contain? 2n^2 electrons, where n is the number of shell. 11 of 14 How many electrons can the first three electron shells hold each? first =2 second = 8 third = 18 12 of 14 What is the equation for relative atomic mass (Ar)? Average mass of 1 atom / 1/12th mass of 1 atom of 12C 13 of 14 What is the equation for relative molecular mass (Mr)? Average mass of 1 molecule / 1/12th mass of 1 atom of 12C 14 of 14
Comments
No comments have yet been made