Question | Answer |
1.What is absolute zero? | a state when atoms are in the lowest possible energy state. |
2.What is accuracy? | refers to how close a measured value is an accepted value. |
3.What is acid-base indicator? | Chemical dye whose color is affected by acidic and basic solutions. |
4.What is an actinide series? | In the periodic table, the f-block elements from period 7 that follow the element actinium. |
5.What is an active site? | The pocket or crevice to which a substance binds in an enzyme-catalyzed reaction. |
6.What is alcohol? | An organic compound in which a hydroxyl group replaces a hydrogen atom of a hydrocarbon. |
7.What is an alloy? | A mixture of elements that have metallic properties. |
8.What is alpha radiation? | Radiation that is made up of alpha particles. |
9.What is an amino acid? | an organic molecule that has both an amino group and a carboxyl group. |
10.What is an atomic number? | The amount of protons in an atom. |
11.What is an atomic mass unit? | One-twelfth the mass of a carbon-12 atom. |
12.What is atomic mass? | The weighed average mass of the isotopes of that element. |
13.What is atmosphere? | The unit that is often used to report air pressure. |
14.What is an anion? | An ion that has a negative charge. |
What is an anode?15. | In an electrochemical cell, the electrode where oxidation takes place. |
16.What is a barometer? | An instrument that is used to measure atmospheric pressure. |
17.What is a buffer? | A solution that resists changes in pH when limited amounts of acid or bases are added. |
18.What is a derived unit? | A unit derived by a combination of base units. |
19.What is a dry cell? | An electrochemical cell that contains a moist electrolytic paste inside a zinc shell. |
20.What is an enzyme? | A biological catalyst. |