Fundamental Ideas in Chemistry 0.0 / 5 ? ChemistryAtomsGCSEAQA Created by: Izzy1999Created on: 09-06-14 18:07 What is an element? An element is a substance that is made from only one type of atom. 1 of 9 What are the horizontal rows called in the period table? Periods 2 of 9 What are the vertical columns called in the period table? Groups 3 of 9 What are substances made from? All substances are made from tiny particles called atoms. 4 of 9 What are electrons, protons and neutrons called? Sub-atomic particles. 5 of 9 What are the electrical charges for electrons, protons and neutrons? Proton are +1, neutron are 0, electrons are -1 6 of 9 The number of electrons in an atom is equal to the number of protons in its nucleus. This means atoms have no overall charge. 7 of 9 What is the atomic number? The number of protons in atom. 8 of 9 What is the mass number of an atom? The total number of protons and neutrons it contains. 9 of 9
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