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Jordan Bailey Pd.4

Across
(of a reaction or process) accompanied by the release of heat.
a type of change in which the form of matter is altered but one substance is not transformed into another
the total number of protons and neutrons in a nucleus.
the strength and vitality required for sustained physical or mental activity:
law stating that every pure substance always contains the same elements combined in the same proportions by weight
the process of corroding metal, stone, or other materials:
an uncharged elementary particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus
Down
a property of a substance relating to its chemical reactivity
a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation:
a theory of the nature of matter: all material substances are composed of minute particles or atoms of a comparatively small number of kinds and all the atoms of the same kind are uniform in size, weight, and other properties
the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.
capable of being hammered out thin, as certain metals; malleable.
a substance made by mixing other substances together:
a part or aspect of something abstract, especially one that is essential or characteristic
the basic unit of a chemical element