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Textbook Vocab. Pg 41-127

8th Grade Period 1-4
Across
A group of chemical symbols and numbers that represent the elements and the number of atoms of each element that make up a compound.
A molecule that has a partial positive end and a partial negative end.
The starting substances in a chemical reaction
A number placed in front of an element symbol or chemical formula in an equation.
A bond formed when many metal atoms share their pooled valence electrons.
Most of an atom's mass and positive charge is concentrated in a small area in the center of the atom.
A force that holds two or more atoms together.
The smallest piece of an element that still represents that element.
The attraction between positively and negatively charged ions in an ionic compound.
A column on the periodic table.
A process in which atoms of one or more substances rearrange to form on or more new substances.
To keep the same.
Atoms of the same element that have different numbers of neutrons
The number of protons in an atom.
A chart of the elements arranged into rows and columns according to their physical and chemical properties.
An outermost electron of an atom that participates in chemical bonding.
Down
A group of atoms held together by covalent bonding that acts as an independent unit.
The sum of the number of protons and neutrons in an atom.
An atomic particle that has one positive charge (1+),
The row on the periodic table.
Process that occurs when an unstable atomic nucleus changes into another more stable nucleus by emitting radiation.
An area around an atomic nucleus where an electron is most likely to be located.
An atom that is no longer neutral because it has gained or lost electrons.
A neutral particle that exists in the nucleus of an atom.
A description of a reaction using element symbols and chemical formulas.
Elements that spontaneously emit radiation.
The substances produced by the chemical reaction
A chemical bond formed when two atoms share one or more pairs of valence electrons