Terms : Hide Images
| 220187165 | neutron | a subatomic particle that has no charge and that is located in the nucleus of an atom | |
| 220187166 | hydrogen bond | weak chemical bond formed by the attraction of positively charged hydrogen atoms to other negatively charged atoms | |
| 220187167 | salt | sodium chloride NaCl | |
| 220187168 | covalent bond | a chemical bond that involves sharing a pair of electrons between atoms in a molecule | |
| 220187169 | atom | (physics and chemistry) the smallest component of an element having the chemical properties of the element | |
| 220187170 | electronegativity | (chemistry) the tendency of an atom or radical to attract electrons in the formation of an hydrogen bond | |
| 220187171 | matter | that which has mass and occupies space | |
| 220187172 | polar covalent bond | a covalent bond in which electrons are not shared equally | |
| 220187173 | double covalent bond | a bond in which two atoms share two pairs of electrons | |
| 220187174 | temperature | the intensity of heat | |
| 220187175 | solution | a liquid consisting of a homogeneous mixture of 2 or more substances | |
| 220187176 | ionic bond | a chemical bond in which one atom loses an electron to form a positive ion and the other atom gains to electron to form a negative ion | |
| 220187177 | chemical bond | an electrical force linking atoms | |
| 220187178 | element | any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter | |
| 220187179 | heat | a form of energy that is transferred by a difference in temperature | |
| 220187180 | buffer | an ionic compound that resists changes in its pH | |
| 220187181 | cohesion | an attraction between molecules of the same substance | |
| 220187182 | solute | the dissolved substance in a solution | |
| 220187183 | acid precipitation | precipitation, such as rain, sleet, or snow, that contains a high concentration of acids, often because of the pollution of the atmosphere | |
| 220187184 | atomic weight | the number of protons plus the number of neutrons | |
| 220187185 | proton | a stable particle with positive charge equal to the negative charge of an electron | |
| 220187186 | electron | an elementary particle with negative charge | |
| 220187187 | pH scale | measurement system used to indicate the concentration of hydrogen ions (H+) in solution; ranges from 0 to 14 | |
| 220187188 | reactant | a chemical substance that is present at the start of a chemical reaction | |
| 220187189 | nonpolar covalent bond | a covalent bond in which the bonding electrons are shared equally by the bonded atoms, resulting in a balanced distribution of electrical charge | |
| 220187190 | polar molecule | a molecule in which the charges are unevenly distributed | |
| 220187191 | product | a chemical substance formed as a result of a chemical reaction | |
| 220187192 | mass number | the sum of the number of neutrons and protons in an atomic nucleus | |
| 220187193 | trace element | An element indispensable for life but required in extremely minute amounts. | |
| 220187194 | acid | a substance that increases the hydrogen ion concentration of a solution | |
| 220187195 | surface tension | a measure of how difficult it is to stretch or break the surface of a liquid | |
| 220187196 | solvent | a liquid substance capable of dissolving other substances | |
| 220187197 | base | a compound that accepts H+ ions and removes them from solution | |
| 220187198 | molecule | two or more atoms held together by covalent bonds | |
| 220187199 | chemical reaction | a process leading to chemical changes in matter | |
| 220187200 | electron shell | an energy level representing the distance of an electron from the nucleus of an atom | |
| 220187201 | atomic number | number of protons in an atom | |
| 220187202 | nucleus | the center of an atom containing protons and neutrons | |
| 220187203 | isotope | a variant form of an element | |
| 220187204 | ion | an atom with an electrical charge resulting from gain or loss of an electron | |
| 220187205 | radioactive isotope | an isotope with a decayed nucleus giving off energy |
