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Chapter 2 Vocabulary Review

Chemistry Mid-Term Vocabulary Practice
Chapter 2
Across
The mass, in unified atomic mass units (u), obtained by adding together the atomic masses of the elements in a compound, taking into account the number of atoms of each element represented in the chemical formula of the compound.
A change of any kind in which the substances involved retain their chemical identities and chemical properties.
The ability of a substance to be shaped (rather than shattered) by pounding. This property is typical of many metals.
A unit of relative atomic ass, defined as exactly 1/12 the mass of an atom of carbon-12.
An obsolet unit used for relative atomic masses; replaced by the unified atomic mass unit, “u”.
Properties of pure substances other than those that describe the substance’s chemical behavior (color, density, boiling point, melting point, electrical conductivity, malleability, vapor, pressure, thermal conductivity, and many others).
The amount of a pure substance that contains Avogadro’s number of particles of the substance.
Variations in the number of neutrons that can be present in the nucleus.
A measure of how much matter is packed into a given volume for different substances
A chemical change in which the oxidation state of an element increases..
Neutrally charged particles located within the atomic nucleus.
Down
Any isotope of an element.
The mass of one mole of a substance in units of grams per mole.
An atom’s central region, which is made up of protons and neutrons. Example: a Helium-4 nucleus has two protons and two neutrons.
A property of pure substances related to a substance’s tendency to engage in specific chemical reactions or processes; a property related to a substance’s tendency to form or break chemical bonds under specific conditions.
The ability of a substance to deform under tension without snapping, thus permitting the substance to be drawn into a wire.
Positively charged particles located within the atomic nucleus.
An electron that is found in the outermost shell of an atom.
Particles that make up elements.
For compounds that exist as molecules, the mass, in unified atomic mass units (u) obtained by adding together the atomic masses of the elements in the compound, taking into account the number of atoms of each element represented in the chemical formula of the compound.
The number of protons in the nucleus of an atom.
A change involving a chemical reaction, in which new chemical species are formed, with chemical identities and chemical properties different from those of the original substance.
Expressed as half the distance between the nuclei of two identical atoms that are bonded together.
Either a proton or a neutron.
Very small, negatively charged particles outside of the atomic nucleus.
Pure substances that cannot be broken down into simpler substances.