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Science Units 15-16
Vocab Mr. Morrison's class 1A
| Question | Answer |
|---|---|
| the combining of atoms to form molecules or compounds | chemical bond |
| a compound made of oppositely charged ions | ionic compound |
| a chemical compound formed by the sharing of electrons | covalent compound |
| any compound that increases the number of hydronium ions when dissolved in water | acid |
| a compound that can reversibly change color depending on conditions such as pH | indicator |
| any compound that increases the number of hydroxide ions when dissolved in water | base |
| the reaction of an acid and a base to form a neutral solution of water and a salt | neutralization reaction |
| a value that is used to express the acidity or basicity (alkalinity) of a system | pH |
| an ionic compound that forms when a metal atom replaces the hydrogen of an acid | salt |
| a covalently bonded compound that contains carbon | organic compound |
| an organic compound composed only of carbon and hydrogen | hydrocarbon |
| a class of energy-giving nutrients that includes sugars, starches, and fiber; composed of one or more simple sugars bonded together | carbohydrate |
| a type of biochemical that does not dissolve in water; fats and steroids are lipids | lipid |
| a molecule that is made up of amino acids and that is needed to build and repair body structures and to regulate processes in the body | protein |
| a molecule made up of subunits called "nucleotides" | nucleic acid |
| the process by which an unstable nucleus gives off nuclear radiation | radioactivity |
| the sum of the numbers of protons and neutrons in the nucleus of an atom | mass number |
| an atom that has the same number of protons (or the same atomic number) as other atoms of the same element do but that has a different number of neutrons (and thus a different atomic mass) | isotope |
| the time needed for half of a sample of a radioactive substance to undergo radioactive decay | half-life |
| the splitting of the nucleus of a large atom into two or more fragments; releases additional neutrons and energy | nuclear fission |
| a continuous series of nuclear fission reactions | nuclear chain reaction |
| the combination of the nuclei of small atoms to form a larger nucleus; releases energy | nuclear fusion |
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