Nuclear equations- page 52 5.0 / 5 based on 1 rating ? PhysicsNuclear equationsGCSEEdexcel Created by: emj790Created on: 15-03-17 18:06 What do the mass and atomic number have to do? Balance on either side of the equation 1 of 40 Why is this? The conservation of mass and energy 2 of 40 What are Nuclear equations? A way of showing radioactive decay by using element symbols 3 of 40 How are they written? (in what form?) Atom before decay -> atom after decay + radiation emitted 4 of 40 What is the relationship between Alpha decay and the charge and mass of the nucleus? The mass and charge of the nucleus decreases after Alpha decay (or during) 5 of 40 What does a nucleus lose when it emits an alpha particle? 2 protons and 2 neutrons 6 of 40 What does this mean? The mass number decreases by 4 + the atomic number decreases by 2 7 of 40 If the radon to start with had a mass number of 226 and Alpha was emitted (4), what must be the mass number of the atom after? 222 because 226-4=222 8 of 40 If 88 before and 2 after, what would would be needed? 86 because 88-2=86 9 of 40 What is the relationship between the charge (of the nucleus) and Beta-minus decay? It increases 10 of 40 Why? Because it gains a proton 11 of 40 What happens in Beta-minus decay? A neutron turns into a proton and an electron 12 of 40 What happens to the mass number? It stays the same 13 of 40 Why? Because it has lost a neutron (1) and gained a proton (1), so they cancel eachother out 14 of 40 What happens to the atomic number? It increases by one 15 of 40 Why? Because it gained a proton 16 of 40 What does Beta-plus decay do to the charge of a nucleus? It decreases 17 of 40 Why? Because it loses a proton by it changing 18 of 40 (C)14 -> ? + (Beta)0 14 Nitrogen 19 of 40 (C)6 -> ? + (Beta)-1 7 Nitrogen 20 of 40 What happens in Beta-plus decay? A proton changes into a neutron and a positron 21 of 40 What happens to the mass number? It doesn't change 22 of 40 Why? Because it has lost a proton but gained a neutron 23 of 40 What happens to the atomic number? It decreases by one 24 of 40 Why? Because it has one less proton 25 of 40 (F)18 -> ? + (Beta)0 18 Oxygen 26 of 40 (F)9 -> ? + (Beta)1 8 Oxygen 27 of 40 What does Neutron emission do to the mass of the nucleus? It decreases by one 28 of 40 Why? Because it loses a neutron 29 of 40 What happens to the atomic number? It stays the same 30 of 40 Why? Because it has not lost any protons 31 of 40 What would Be^13 \/4 emit? Be^12 \/4 + n^1 \/0 32 of 40 What happens to the charge and mass of the nucleus when gamma rays are emitted? They don't change 33 of 40 What are gamma rays? A way of getting rid of excess energy from an atom 34 of 40 What happens to a nucleus by emitting a gamma ray? It goes from an excited state to a more stable state 35 of 40 What happens to the charge of the nucleus? It stays the same 36 of 40 What type of radiation is given off in this decay? Li ^8 \/3 -> Be^8 \/4 + radiation Beta-minus particle 37 of 40 Write the nuclear equation for Rn^219 \/86 decaying to Po by emitting an alpha particle Rn^219 \/86 -> Po^215 \/84 + alpha^4 \/2 38 of 40 What happens in both alpha and beta emissions? A new element will be formed 39 of 40 Why? Because the atomic number/ number of protons changes 40 of 40
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