Chemistry C1 1.3 The arrangement of elections in atoms. 0.0 / 5 ? ChemistryAtomsGCSEAQA Created by: Atlanta and JacobCreated on: 20-04-16 18:44 What atoms have very stable arrangements of electrons? All the atoms of the un-reactive noble gases (in Group 0). 1 of 15 Where are electrons in atoms? In energy level that can be represented by shells. 2 of 15 Where are electrons in the lowest energy levels located? In the shell closest to the nucleus. 3 of 15 In which order do electrons occupy energy levels? Electrons occupy the lowest energy levels first. 4 of 15 What do all the elements in the same group of the periodic table have? The same number of electrons in their highest energy level (outer shell). 5 of 15 What is each electron in an atom in? An energy level. 6 of 15 How can energy levels be represented? As shells, with electrons in the lowest energy level closest to the nucleus. 7 of 15 How many electrons can the lowest energy level or first shell hold? Two electrons. 8 of 15 How many electrons can energy levels after the lowest energy level hold? Eight electrons. 9 of 15 What energy levels do electrons occupy? The lowest possible energy levels. 10 of 15 What is the electronic structure of neon? Neon has 10 electrons therefore has the electronic structure 2,8. 11 of 15 What is the electronic structure of sodium? Sodium has 11 electrons therefore has the electronic structure 2,8,1. 12 of 15 What do Group 1 elements lithium, sodium and potassium have in common? They all have one electron in their highest energy level. They react quickly with water and with oxygen. 13 of 15 Why are nitrogen and phosphorus both in Group 5 in the periodic table? Both have 5 electrons in their highest energy level (outer shell). 14 of 15 **YOU SHOULD BE ABLE TO WORK OUT THE NUMBERS OF PROTONS, NEUTRONS AND ELECTRONS FOR ANY ATOM FROM ITS ATOMIC NUMBER AND MASS NUMBER*** ** 15 of 15
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