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Atoms and Chem. Form

7th Grade Unit 2

TermDefinition
Coefficients Numbers written in front of a chemical formula
Subscripts a small character or number that is written below the line of text. It is commonly used to represent: The number of atoms in a chemical formula or the position of an element in a compound
Cations An ion with a positive charge. It has fewer electrons than protons.
Anions An ion with a negative charge. It has more electrons than protons.
Chemical Formula Notation that shows the number and type of atoms in a molecule
Ions An electrically charged atom or molecule. This means the atom or molecule has an unequal number of protons and electrons.
Chemical Bond Forces that hold the atoms together in a molecule. They are a result of strong intramolecular interactions among the atoms of a molecule.
Compound A substance made of two or more elements chemically bonded to each other in a fixed ratio.
Chemical Symbol The abbreviations for elements
Periodic Table The organized array of all the chemical elements in order of increasing atomic number
Molecule An electrically neutral group of elements chemically bonded together
Atom The basic building blocks of matter made up of protons, neutrons, and electrons
Elements A pure substance composed of atoms that all have the same number of protons in the atomic nucleus.
Created by: klstorie
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