Chemistry 0.0 / 5 ? ChemistryAll Of ChemistryGCSEEdexcel Created by: Vyshto AndedduCreated on: 16-01-23 21:21 What is an atom? The smallest particle of matter that acts as a building block of an element 1 of 20 What is an atomic number? The number of protons in an atom's nucleus 2 of 20 What is a compound? A substance that consists of two or more types of elements 3 of 20 What is the charge of an electron? -1 4 of 20 What is the charge of a proton? +1 5 of 20 What is the charge of a neutron? 0 6 of 20 What is the pH of an acid? < 7 7 of 20 What is the pH of an alkali >7 8 of 20 What is a base? A substance that reacts with acids to neutralise them 9 of 20 What is a covalent bond? A bond created between atom by sharing a pair of electrons 10 of 20 What are delocalised electrons? Electrons that can move through a structure 11 of 20 What is a diatomic molecule? A molecule that contains two atoms 12 of 20 What is a dot-and-cross diagram? A drawing depicting bonding using dots and crosses to indicate where electrons have come from 13 of 20 What is an isotope? Isotopes are atoms that have the same number of protons but differing numbers of neutrons 14 of 20 What is an element? A substance that contains one type of atom 15 of 20 What is an exponent? The power of 10 in a number expressed in standard form 16 of 20 What is mass? Mass is the measure of the amount of a substance 17 of 20 What is a mass number? The sum of protons and neutrons in an atom 18 of 20 What is a mixture? A mixture is two or more substances not chemically bonded together 19 of 20 What is a molecule? A combination of two or more atoms 20 of 20
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