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CD Science

Chapter 16 Section 1 & 2

electron cloud region surrounding the nucleus of an atom. Where electrons are most likely to be found.
energy level the different positions for an electron in an atom
electron dot diagram chemical symbol for an element surrounded by as many dots as there are electrons in its outer energy level.
chemical bond force that hold two atoms together.
ion atom that is positively or negatively charged because it has gained or lost one or more electrons.
ionic bond attraction that hold oppositely charged ions close together.
compound pure substance that contains two or more elements
metallic bond bond formed when metal atoms share their pooled electrons
covalent bond chemical bond formed when atoms share electrons
molecule neutral particle formed when atoms share electrons
polar bond bond resulting from the unequal sharing of electrons
chemical formula combination of chemical symbols and numbers that indicates which elements and how many atoms of each element are present in a molecule.