Terms : Hide Images
| 905578019 | Matter | anything that takes up space and has mass | 1 | |
| 905578020 | matter exists as | many forms, rocks, metal, oil gass | 2 | |
| 905578021 | Mass | the amount of matter in an object | 3 | |
| 905578022 | Element | a substance that cannot be broken down into other substances by any chemical reaction | 4 | |
| 905578023 | Compound | a substance consisting of 2 or more different elements, ex table salt, or water | 5 | |
| 905578024 | Atom | the smallest part of an element | 6 | |
| 905578025 | molecule | two or more atoms held together by covalent bonds | 7 | |
| 905578026 | What are the 4 elements that make up 96 of all living life | hydrogen, oxygen, carbon, nitrogen | 8 | |
| 905578027 | Proton | has one unit of positive charge | 9 | |
| 905578028 | Electron | has one unit of negative charge | 10 | |
| 905578029 | Neutron | electrically neutral | 11 | |
| 905578030 | Dalton | units of measurements for atoms, subatomic particles and molecules, neutrons and protons have masses close to 1 dalton | 12 | |
| 905578031 | Atomic number | the number of protons in the atom, the number on the table of elements | 13 | |
| 905578032 | atomic weight | is determined by the number of protons and the number of neturons | 14 | |
| 905578033 | atomic mass | the mass number is an approximation of the total mass of an atom | 15 | |
| 905578034 | isotopes | different atomic forms of the same element, ex carbon | 16 | |
| 905578035 | energy | the capacity to change......to move matter against an opposing force | 17 | |
| 905578036 | valence electrons | the outer most electrons on the outermost shell | 18 | |
| 905578037 | full valence shells | are inert/ or chemically unreactive | 19 | |
| 905578038 | chemical bonds | an attraction between two atoms from sharing of outer shell electrons | 20 | |
| 905578039 | covalent bond | the sharing of a pair of valence electrons by 2 atoms | 21 | |
| 905578040 | molecule | two or more atoms held together by covalent bonds | 22 | |
| 905578041 | ionic bonds | a chemical bond resulting from the attraction between oppositely charged ions | 23 | |
| 905578042 | ion | is a atom or molecule that has gained or lost one or more electrons | 24 | |
| 905578043 | hydrogen bond | non covalent attraction between hydrogen and an electronegative atom | 25 | |
| 905578044 | chemical reactions | making and breaking of chemical bonds, leading to changes in the composition of matter, example the reaction between hydrogen and oxygen molecules that form water | 26 | |
| 905578045 | cohesion | hydrogen bonds that hold the substance together | 27 | |
| 905578046 | adhesion | the clinging of one substance to another | 28 | |
| 905578047 | kinetic energy | the energy of motion, anything that moves | 29 | |
| 905578048 | thermal energy | random movement of atoms or moleules | 30 | |
| 905578049 | temperature | the average kinetic energy of a molecule, regardless of volume | 31 | |
| 905578050 | Hydroxl | H-O- | 32 | |
| 905578051 | Hydronium ion | H-O-H+ H | 33 | |
| 905578052 | pH | the negative log of the concentration of hydrogen ions | 34 | |
| 905578053 | -log [H+] | pH | 35 | |
| 905578054 | pH of 1 is | acidic | 36 | |
| 905578055 | pH of 14 | very basic | 37 | |
| 905578056 | buffer | something that will change the pH of a solution | 38 | |
| 905578057 | is a trace element an essential element? | yes, because an organism requires trace elements, even if just in a small amount | 39 | |
| 905578058 | The reactivity of an atom rises from? | the existence of unpaired electrons in the valence shell | 40 |
