Atomic structure key words 0.0 / 5 ? ChemistryAtomsGCSEAQA Created by: Amelia200314Created on: 21-03-19 15:52 86210315749 Across 1. A compound where ions are held together by ionic bonds is called a...? (5, 8) 4. An...? is a electrically charged atom or molecule (3) 5. The sum of the relative atomic masses of the elements in a substance is called the relative...? mass (7) 6. A substance made from two or more elements chemically bonded together is called a...? (8) 9. The relative...? mass is a measure of how heavy atoms are (6) 10. The rows in the periodic table which contain elements with the same number of electron shells are called...? (7) Down 2. A reaction that adds oxygen to a chemical (loss of electrons) is called...? (9) 3. A reaction that gives out energy to the surroundings is...? (10) 7. A substance with two or more elements that are not chemically bonded together is called a...? (7) 8. A reaction that removes oxygen from a chemical (gain of electrons) is called...? (9)
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