Terms : Hide Images
| 2818723854 | Atom | Smallest unit of an element |  | 0 |
| 2818723855 | Element | A pure substance that cannot be broken down into other substances by chemical or physical means |  | 1 |
| 2818724570 | Valence Electron | Electrons on the outermost energy level of an atom |  | 2 |
| 2818724571 | Compound | A substance made up of atoms of two or more different elements joined by chemical bonds |  | 3 |
| 2818725590 | Ion | A charged atom |  | 4 |
| 2818725591 | Cohesion | Attraction between molecules of the same substance |  | 5 |
| 2818725592 | Adhesion | An attraction between molecules of different substances | | 6 |
| 2818725593 | Solution | A mixture that forms when one substance dissolves another. |  | 7 |
| 2818725819 | Acid | A compound that produces hydrogen ions in a solution. A substance that tastes sour, reacts with metals and carbonates, and turns blue litmus red. |  | 8 |
| 2818725820 | Base | A substance that tastes bitter, feels slippery, and turns red litmus paper blue. Decreases H+ concentration. |  | 9 |
| 2818725821 | pH | Scale that measures how acidic or basic a substance is. |  | 10 |
| 2818725822 | Solvent | A liquid substance capable of dissolving other substances |  | 11 |
| 2818726019 | Solute | A substance that is dissolved in a solution. |  | 12 |
| 2818726020 | Carbohydrate | Class of nutrients that includes sugars and starches |  | 13 |
| 2818726021 | Lipid | Energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen. |  | 14 |
| 2818726279 | Protein | An organic compound that is made of one or more chains of amino acids and that is a principal component of all cells |  | 15 |
| 2818726280 | Amino Acid | Building blocks of proteins |  | 16 |
| 2818726281 | Nucleic Acid | Stores and transmits genetic information |  | 17 |
| 2818726475 | Nucleotide | Building block of DNA |  | 18 |
| 2818726476 | Energy | The ability to do work |  | 19 |
| 2818726477 | Reactant | A chemical substance that is present at the start of a chemical reaction |  | 20 |
| 2818726478 | Product | A substance produced in a chemical reaction |  | 21 |
| 2818726793 | Active Site | the site on an enzyme that attaches to a substrate |  | 22 |
| 2818726794 | Enzyme | A type of protein that speeds up a chemical reaction in a living thing |  | 23 |
| 2818727144 | Substrate | A substance on which an enzyme acts during a chemical reaction. | | 24 |
| 2818757468 | Molecule | A group of atoms held together by covalent bonds. |  | 25 |
| 2882585523 | Ionic bond | A chemical bond resulting from the attraction between oppositely charged ions. | 26 | |
| 2882589021 | Isotope | Atoms of the same element that have different numbers of neutrons | 27 | |
| 2882601926 | Nucleus | A region that is located at the center of an atom and contains most of the atom's mass (protons and neutrons) | 28 | |
| 2882606762 | Hydrogen Bond | A type of weak chemical bond formed when the slightly positive hydrogen atom of a polar covalent bond in one molecule is attracted to the slightly negative atom of a polar covalent bond in another molecule. | 29 |
