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| Periodic Table of the Elements |
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| A table that arranges elements based on their chemical properties |
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| an isotope that spontaneously emits energy in the form of subatomic particles and x-rays when its nucleus disintegrates |
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| is the process when the nucleus of an element disintegrates |
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| molecules in which a radioisotope has been substituted for a more stable isotope |
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| when atoms share their electrons |
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| two or more atoms of the same or different elements joined in a chemical bond |
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| molecules that consist of two or more different elements in proportions that never do vary |
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| two or more substances intermingle without bonding |
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| when atoms share two electrons, and this bond is stronger than an ionic bond |
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| a weak attraction formed between a covalently bound hydrogen atom and an electronegative atom in a different molecule or in a different region on the same molecule |
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| water-dreading substances |
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| measure of molecular motion |
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| when heat energy converts liquid water to gas form |
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| something is showing a capacity to resist rupturing when it is stretched or placed under tension |
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| is a scale that measures the concentration of hydrogen ions in solutions |
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| any compound that dissolves easily in water |
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| counter slight shifts in pH |
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